WO2020088565A1 - 检测波束失败的方法和装置 - Google Patents

检测波束失败的方法和装置 Download PDF

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Publication number
WO2020088565A1
WO2020088565A1 PCT/CN2019/114567 CN2019114567W WO2020088565A1 WO 2020088565 A1 WO2020088565 A1 WO 2020088565A1 CN 2019114567 W CN2019114567 W CN 2019114567W WO 2020088565 A1 WO2020088565 A1 WO 2020088565A1
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Prior art keywords
reference signal
node
type
downlink
signal
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PCT/CN2019/114567
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English (en)
French (fr)
Inventor
袁世通
刘凤威
陈磊
邱晶
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华为技术有限公司
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Publication of WO2020088565A1 publication Critical patent/WO2020088565A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/04—Arrangements for maintaining operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0203—Power saving arrangements in the radio access network or backbone network of wireless communication networks
    • H04W52/0206—Power saving arrangements in the radio access network or backbone network of wireless communication networks in access points, e.g. base stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present application relates to the technical field of integrated access backhaul IAB, in particular to a method and device for detecting beam failure in an IAB network.
  • beamforming technology can effectively combat path loss, thereby improving the coverage and capacity of the network.
  • the better the alignment between the beam and the communication device the greater the signal gain provided by the beam.
  • beam failure sometimes occurs. After a beam failure occurs, the communication device needs to switch the current failed beam to other available beams for beam failure recovery (beam failure recovery, BFR).
  • IAB nodes are more complex to deploy than relays in long term evolution (LTE) and can support multi-hop relays.
  • LTE long term evolution
  • each IAB node also serves as a base station device to provide access services for a large number of user equipment. If a beam failure occurs at the IAB node, it will affect the services of a large number of users, so it is necessary to complete the beam failure recovery at a fast speed.
  • the speed of beam failure recovery is related to many factors. If only the speed of beam failure recovery is considered, the performance of the IAB system may be reduced in other aspects, such as increased resource overhead Large, increased delay, increased power consumption of IAB nodes, etc. Therefore, how to optimize the beam failure recovery mechanism in the IAB system needs to be considered for the performance of the IAB.
  • the present application provides a method and device for detecting beam failure, which can optimize the beam failure recovery mechanism.
  • the present application provides a method for detecting beam failure.
  • the method includes: a first node measuring a first type of reference signal and a second type of reference signal sent by a second node at a predetermined resource location, the first type The reference signal is used for beam failure detection, and the second type of reference signal is used to demodulate the downlink signal sent by the second node, wherein the interval between the first type of reference signal and the second type of reference signal in the time domain is less than a preset time In the window, the first node does not measure the first reference signal and the second reference signal at the same time; the first node performs the service beam based on the measurement result of the first reference signal or the second reference signal Failure detection.
  • the downlink signal may also be downlink data.
  • the predetermined resource location may include a manner defined by a protocol or pre-configured by a superior node, which is not limited in this application.
  • the resources here include time-domain resources, frequency-domain positions, and time-frequency resources.
  • the interval between the first type of reference signal and the second type of reference signal in the time domain is less than a preset time window, including that the first type of reference signal and the second type of reference signal overlap in the time domain.
  • the technical solution of the present application can be used for failure detection of downlink beams, and can also be used for failure detection of uplink beams.
  • the failure detection of the following beam is used as an example, the second node is an upper node of the first node, or, the first node is a lower node of the second node.
  • the first node when the second node sends a downlink signal at a predetermined resource location, the first node may perform beam failure by measuring the demodulation reference signal (ie, the second reference signal) of the downlink signal Detection, will not increase the power consumption of the first node. At this time, since the first node can perform beam failure detection by measuring the second type of reference signal, the second node may not send the first type of reference signal, so the resource overhead of the second node can also be reduced. When the second node does not send a downlink signal at a predetermined resource location, the second node sends the first type of reference signal at the predetermined resource location. The first node performs beam failure measurement by measuring the first type of reference signal. A node ensures beam failure detection without receiving downlink signals. By performing beam failure detection according to the technical solution provided by the present application, the mechanism of beam failure recovery can be optimized. For example, reduce resource overhead and reduce the power consumption of IAB nodes.
  • the first node measuring the first reference signal and the second reference signal sent by the second node at a predetermined resource location includes: The scheduling of the second node determines that when the downlink signal is received at a predetermined resource location, the first node measures the second type of reference signal and does not measure the first type of reference signal; or, the first node determines that the predetermined resource position is not used for scheduling During the transmission of the downlink signal, the first node measures the first type of reference signal.
  • the first node when the first node determines that there is a downlink signal at a predetermined resource location, the first node performs beam failure detection by measuring the demodulation reference signal used to demodulate the downlink signal, that is, the second type of reference signal .
  • the first node determines that there is no downlink signal at a predetermined resource location, the first node performs beam failure detection by measuring the first type of reference signal.
  • the first node performs failure detection of the service beam according to the measurement result of the first reference signal or the second reference signal, including: A measurement result of a reference signal or a second reference signal, and a determination condition to perform failure detection of the service beam, wherein the determination condition is set according to a quality parameter of the reference signal and used to evaluate the quality of the reference signal conditions of.
  • the first node when the first node measures the first type of reference signal at a predetermined resource location, the first node performs failure detection of the service beam according to the measurement result and the determination conditions of the first type of reference signal.
  • the first node measures the second reference signal at a predetermined resource location, and the first node performs failure detection of the service beam according to the measurement result of the second reference signal and the determination condition.
  • the method further includes: the first node detects the candidate beam set to obtain a measurement result of the candidate beam, where the measurement result of the candidate beam is used to indicate the candidate beam Quality; the first node starts the timer; after the first node determines that the service beam has failed, the method further includes: the first node determines whether the timer times out, and according to the candidate beam if the timer does not time out The measurement result of, determines one or more first beams that can be used to replace the service beam from the candidate beam set.
  • the first node starts a timer immediately after detecting the candidate beam set to obtain a measurement result, and the timer is used as a basis for the first node to determine whether the measurement result of the candidate beam set is valid. After the first node starts the timer, if the first node detects that the service beam fails, at this time, if the timer has not expired, the first node considers that the measurement result of the candidate beam set is still valid. In this case, based on the measurement results of the candidate beam set, the first node selects one or more new beams that can be used to replace the service beam from the candidate beam set, and directly enters the beam failure recovery process without waiting for the next time The timing of candidate beam detection can accelerate the speed of BFR.
  • the first node when the interval between the first reference signal and the second reference signal in the time domain is less than a preset window, the first node does not measure the first reference signal at the same time
  • the second type of reference signal including: when the first node measures the second type of reference signal, the first type of reference signal is not measured within a preset time window; or, when the first node measures the first type of reference signal, The second reference signal is not measured within the preset time window.
  • the resource positions of the first reference signal are periodically distributed in the time domain, and the period of the time domain resources of the first reference signal is greater than or It is equal to the period of the downlink time domain resource between the first node and the second node.
  • the period of the time domain resource of the first type of reference signal is an integer multiple of the period of the downlink time domain resource between the first node and the second node.
  • the present application provides a method for detecting beam failure.
  • the method includes: a second node determines a resource position for sending a first type of reference signal and a resource position for sending a second type of reference signal, and the first type of reference signal is used for For beam failure detection, the second type of reference signal is used to demodulate the downlink signal sent by the second node; the second node sends the first type of reference signal and / or the second type of reference signal at the determined resource location.
  • the second node sending the first type of reference signal and / or the second type of reference signal at the determined resource location includes: the second node schedules the first node to When receiving the downlink signal at the determined resource location, the second node does not send the first type of reference signal at the resource location where the second type of reference signal is sent.
  • the first node may perform beam failure detection by measuring the demodulation reference signal of the downlink signal, that is, the second type of reference signal. At this time, the second node may not send the first type of reference signal at the resource position of the second type of reference signal to save resource overhead.
  • the resource positions of the first reference signal are periodically distributed in the time domain, and the period of the time domain resources of the first reference signal is greater than or It is equal to the period of the downlink time domain resource between the first node and the second node.
  • the period of the time domain resource of the first type of reference signal is an integer multiple of the period of the downlink time domain resource between the first node and the second node.
  • the present application provides an apparatus for detecting beam failure.
  • the apparatus has the function of the first node in the first aspect or any possible implementation manner of the first aspect. These functions can be realized by hardware, or can also be realized by hardware executing corresponding software.
  • the hardware or software includes one or more units corresponding to these functions.
  • the present application provides an apparatus for detecting beam failure, which has the function of the second node in the second aspect or any possible implementation manner of the second aspect.
  • These functions can be realized by hardware, or can also be realized by hardware executing corresponding software.
  • the hardware or software includes one or more units corresponding to these functions.
  • the present application provides a communication device, including a transceiver, a processor, and a memory.
  • the processor is used to control the transceiver to send and receive signals
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory, so that the communication device executes the method in the first aspect or any possible implementation manner of the first aspect.
  • the present application provides a communication device, including a transceiver, a processor, and a memory.
  • the processor is used to control the transceiver to send and receive signals
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory, so that the communication device executes the method in the second aspect or any possible implementation manner of the second aspect.
  • the present application provides a computer-readable storage medium having instructions stored therein, which when executed on a computer, causes the computer to perform the above-mentioned first aspect or any possible implementation of the first aspect The way in the way.
  • the present application provides a computer-readable storage medium having instructions stored therein, when the instructions run on a computer, the computer is allowed to execute the second aspect or any possible implementation manner of the second aspect The method.
  • the present application provides a chip including a processor.
  • the processor is used to read and execute the computer program stored in the memory to execute the method in the first aspect or any possible implementation manner of the first aspect.
  • the chip includes a memory, and the memory is connected to the processor. Further optionally, the chip further includes a communication interface, and the processor is connected to the communication interface.
  • the communication interface is used to receive signals and / or data that need to be processed.
  • the processor obtains the signals and / or data from the communication interface, processes the signals and / or data, and outputs the processing results through the communication interface.
  • the present application provides a chip, including a processor.
  • the processor is used to read and execute the computer program stored in the memory to execute the method in the second aspect or any possible implementation manner of the second aspect.
  • the chip includes a memory, and the memory is connected to the processor. Further optionally, the chip further includes a communication interface, and the processor is connected to the communication interface.
  • the communication interface is used to receive signals and / or data that need to be processed.
  • the processor obtains the signals and / or data from the communication interface, processes the signals and / or data, and outputs the processing results through the communication interface.
  • the aforementioned memory and the memory may be physically independent units, or the memory may be integrated with the processor.
  • the present application provides a computer program product, the computer program product including computer program code, when the computer program code runs on a computer, causing the computer to perform the first aspect or any one of the first aspect Implementation method.
  • the present application provides a computer program product, the computer program product comprising computer program code, which causes the computer to execute the second aspect or any possible implementation manner of the second aspect when the computer program code runs on the computer Methods.
  • the first node when the second node sends a downlink signal at a predetermined resource location, the first node may perform beam failure by measuring the demodulation reference signal (ie, the second reference signal) of the downlink signal Detection, will not increase the power consumption of the first node. At this time, since the first node can perform beam failure detection by measuring the second type of reference signal, the second node may not send the first type of reference signal, so the resource overhead of the second node can also be reduced. When the second node does not send a downlink signal at a predetermined resource location, the first node performs beam failure measurement by measuring the first reference signal, which can ensure that the first node can also perform beam failure without receiving a downlink signal. Detection. By performing beam failure detection according to the technical solution provided by the present application, the mechanism of beam failure recovery can be optimized. For example, reduce resource overhead and reduce the power consumption of IAB nodes.
  • FIG. 1 is a schematic structural diagram of a communication system applicable to an embodiment of the present application.
  • FIG. 2 is a schematic diagram of beam failure detection and BFR.
  • FIG. 3 is a schematic flowchart of a method 300 for detecting beam failure provided by the present application.
  • FIG. 4 is an example in which the second node transmits the reference signal to the first node.
  • FIG. 5 is another example where the second node sends the reference signal to the first node.
  • FIG. 6 is a schematic diagram of an effective window of measurement results of candidate beams.
  • (1) and (2) in FIG. 7 are schematic diagrams of uplink beam failure detection.
  • FIG. 8 is a schematic structural block diagram of a communication device 500 provided by the present application.
  • FIG. 9 is a schematic structural block diagram of a communication device 600 provided by the present application.
  • FIG. 10 is a schematic structural diagram of a communication device 700 provided by the present application.
  • FIG. 11 is a schematic structural diagram of a communication device 800 provided by the present application.
  • IAB node the relay node supporting the IAB scheme
  • LTE long term evolution
  • LTE long term evolution
  • the system containing IAB nodes is also called a relay system.
  • FIG. 1 is a schematic structural diagram of a communication system applicable to an embodiment of the present application.
  • the communication systems mentioned in the embodiments of the present application include, but are not limited to: narrow-band Internet of Things (narrow band-internet of things, NB-IoT) system, wireless local area network (wireless local access network, WLAN) system, LTE system , Next-generation 5G mobile communication system or communication system after 5G, such as NR, device-to-device (D2D) communication system, etc.
  • narrow-band Internet of Things narrow band-internet of things, NB-IoT
  • wireless local area network wireless local access network
  • LTE Long Term Evolution
  • Next-generation 5G mobile communication system or communication system after 5G such as NR, device-to-device (D2D) communication system, etc.
  • FIG. 1 shows the IAB system.
  • An IAB system includes at least one base station 100, and one or more terminal devices (terminals) 101 served by the base station 100, one or more relay nodes (ie, IAB nodes) 110, and one served by the IAB node 110 Or multiple terminal devices 111.
  • the base station 100 is called a donor base station (donor next generation node B, DgNB), and the IAB node 110 is connected to the base station 100 through a wireless backhaul link 113.
  • the host base station is also referred to as a host node, that is, a Donor node in this application.
  • the base station 100 includes but is not limited to: evolved node B (evolved node base, eNB), radio network controller (radio network controller, RNC), node B (node B, NB), base station controller (base station controller, BSC) , Base transceiver station (BTS), home base station (home evolved NodeB, or home node B, HNB), baseband unit (baseband unit, BBU), evolved (LTE, eLTE) base station, NR base station (next generation, node B, gNB), etc.
  • evolved node B evolved node base, eNB
  • RNC radio network controller
  • node B node B
  • base station controller base station controller
  • BSC Base transceiver station
  • home base station home evolved NodeB, or home node B, HNB
  • baseband unit baseband unit
  • BBU evolved (LTE, eLTE) base station
  • NR base station noext generation, node B, gNB
  • Terminal equipment includes but is not limited to: user equipment (user equipment (UE), mobile station, access terminal, user unit, user station, mobile station, remote station, remote terminal, mobile device, terminal, wireless communication device, user agent, Stations (ST), cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (wireless local loop) (WLL) stations in wireless local area network (WLAN) Personal digital processing (personal digital assistant, PDA), handheld devices with wireless communication capabilities, computing devices, other processing devices connected to wireless modems, in-vehicle devices, wearable devices, mobile stations in future 5G networks, and future evolving public Any one of terminal equipment in a land mobile network (PLMN) network.
  • the IAB node is a specific name of the relay node, and does not limit the scheme of the present application. It may be one of the above base stations or terminal devices with a forwarding function, or may be an independent device form.
  • the integrated access and backhaul system may also include multiple other IAB nodes, such as IAB node 120 and IAB node 130.
  • the IAB node 120 is connected to the IAB node 110 via a wireless backhaul link 123 to access the network.
  • the IAB node 130 is connected to the IAB node 110 via a wireless backhaul link 133 to access the network.
  • the IAB node 120 serves one or more terminal devices 121, and the IAB node 130 serves one or more terminal devices 131.
  • both IAB node 110 and IAB node 120 are connected to the network through a wireless backhaul link.
  • the wireless backhaul links are all viewed from the perspective of the relay node, for example, the wireless backhaul link 113 is the backhaul link of the IAB node 110, and the wireless backhaul link 123 is the IAB node 120 Backhaul link.
  • an IAB node such as 120
  • the relay node can be connected to the network via a multi-level wireless relay node.
  • IAB nodes can refer to any node or device with a relay function. The use of the IAB node and the relay node in this application should be understood to have the same meaning.
  • Superior node a node that provides wireless backhaul link resources, such as 110, a superior node called IAB node 120,
  • Subordinate nodes Nodes that use the backhaul link resources to transmit data to the network, or receive data from the network.
  • 120 is called a subordinate node of the relay node 110.
  • the network mentioned here may be a network on the core network or other access networks, such as the Internet or a private network.
  • Access link The link between the UE and the IAB node or the IAB donor node (IAB donor). Or, the access link includes a wireless link used by a certain node to communicate with its subordinate nodes.
  • the access link includes an uplink access link and a downlink access link.
  • the uplink access link is also called uplink transmission of the access link, and the downlink access link is also called downlink transmission of the access link.
  • the backhaul link includes a downlink transmission link with the IAB child node or IAB parent node, and an uplink transmission link with the IAB child node or IAB parent node.
  • the IAB node transmits data to the IAB parent node, or receives the uplink transmission of the IAB child node is called the uplink transmission of the backhaul link.
  • the IAB node receives the data transmission from the IAB parent node, or the data transmission to the IAB child node is called the downlink transmission of the backhaul link.
  • the backhaul link between the IAB node and the IAB parent node is also called the parent backhaul link (parent BH), and the backhaul link between the IAB node and the IAB child node It is called the subordinate backhaul link (child BH).
  • the lower node can be regarded as a terminal device of the upper node.
  • one IAB node is connected to one superior node.
  • an IAB node such as 120
  • IAB node 130 can have multiple superior nodes simultaneously serving an IAB node, as shown in Figure 1 IAB node 130 also It can be connected to the IAB node 120 through the backhaul link 134, that is, both the IAB node 110 and the IAB node 120 are regarded as superior nodes of the IAB node 130.
  • the names of the IAB nodes 110, 120, and 130 do not limit the scenarios or networks in which they are deployed, and can be any other names such as relay, RN, and so on. The use of IAB nodes in this application is only for the convenience of description.
  • the wireless links 102, 112, 122, 132, 113, 123, 133, and 134 may be bidirectional links, including uplink and downlink transmission links.
  • the wireless backhaul links 113, 123, 133, and 134 may be used by upper-level nodes to provide services for lower-level nodes, such as the upper-level node 100 is a lower-level node.
  • 110 provides wireless backhaul service. It should be understood that the uplink and downlink of the backhaul link may be separated, that is, the uplink and downlink are not transmitted through the same node.
  • the downlink transmission refers to an upper node, such as node 100, and a lower node, such as node 110, to transmit information or data
  • the uplink transmission refers to a lower node, such as node 110, to an upper node, such as node 100, to transmit information or data.
  • the node is not limited to whether it is a network node or a terminal device.
  • the terminal device may serve as a relay node to serve other terminal devices.
  • the wireless backhaul link can be an access link.
  • the backhaul link 123 can also be regarded as an access link for the node 110, and the backhaul link 113 is also the access of the node 100. link.
  • the above-mentioned higher-level node may be a base station or a relay node
  • the lower-level node may be a relay node or a terminal device with a relay function.
  • the lower-level node may also be a terminal device.
  • the relay nodes shown in FIG. 1, such as 110, 120, and 130, can exist in two forms: one exists as an independent access node, and can independently manage the terminal devices that access the relay node.
  • a node usually has an independent physical cell identifier (PCI).
  • PCI physical cell identifier
  • This type of relay usually requires a complete protocol stack function.
  • RRC radio resource control
  • this kind of relay is usually called layer 3 relay.
  • Donor node and Donor node such as Donor eNB, Donor gNB
  • user management is managed by the host base station, such as Donor node, this relay is usually Called layer 2 relay.
  • Layer 2 relays usually exist as DUs of the base station DgNB under the NR control and bearer separation (central unit and distributed unit, CU-DU) architecture, and communicate with the CU through the (F1application protocol, F1-AP) interface or tunneling protocol , Where the tunnel protocol may be, for example, a general packet radio service tunnel protocol (general packet radio service tunneling protocol, GTP) protocol, which will not be described in detail.
  • the Donor node refers to a node that can access the core network through the node, or an anchor base station of the wireless access network, through which the base station can access the network.
  • the anchor base station is responsible for receiving the data of the core network and forwarding it to the relay node, or receiving the data of the relay node and forwarding it to the core network.
  • the Donor node in the relay system is called IAB Donor, that is, the host node.
  • IAB Donor that is, the host node.
  • the two terms in this application may be used interchangeably. It should be understood that the IAB donor and the host node should not be understood as entities with different functions or Network element.
  • Beamforming as one of the key technologies of the 5th generation (5G) mobile communication system, can effectively combat path loss, thereby improving network coverage and capacity.
  • the better the alignment between the beam and the user the greater the gain of the signal provided by the beam.
  • beam failure may occur in some application scenarios. For example, in a 5G millimeter wave system, channel fluctuations are more severe, which may cause beam failure between two communication devices (for example, a base station and a terminal device). For another example, the occlusion of the building will also cause the beam between the two communication devices to fail.
  • the terminal device in the case of a beam failure, the terminal device will not be able to decode any downlink signal due to the misalignment of the beam between the base station and the terminal device, and the base station will also not Any uplink signal. If these failures occur repeatedly, they will fall into a radio link failure (RLF).
  • RLF radio link failure
  • the downlink beam fails if the UE has a replacement or can use other beams to replace the currently failed service beam, there may be an opportunity to avoid RLF caused by beam failure. For this reason, after a beam failure occurs, beam failure recovery is performed.
  • Beam failure recovery refers to adjusting the currently failed service beam to the beam available in the candidate beam according to the measurement result of the candidate beam.
  • the beam failure is detected by the terminal device, and the beam failure recovery is also triggered by the terminal device.
  • the failure of the uplink beam can be detected by the base station device, and the recovery of the beam failure is also triggered by the base station device.
  • beam failure recovery mainly refers to the recovery of downlink beams.
  • the detection and recovery of beam failure mainly includes the following processes.
  • the base station equipment is configured with a beam failure detection (BFD) reference signal (reference signal, RS) set.
  • BFD beam failure detection
  • RS reference signal
  • the BFD RS set generally includes two RSs.
  • the beam failure is determined based on the hypothetical downlink physical control channel (PDCCH) block error rate (BLER).
  • PDCCH physical control channel
  • BLER block error rate
  • the PHY layer of the UE determines the BLER ⁇ 10% of the PDCCH based on the hypothetical PDCCH, and the PHY layer reports a beam failure instance (BFI) to the MAC layer.
  • the detection period of the PHY layer is the shortest of the above two RS periods.
  • the MAC layer starts a timer configured by the base station device through RRC messages. Before the timer expires, if the MAC layer receives the BFI reported by the PHY layer again, the timer is reset and the BFI counter is incremented. Before the timer expires, if the MAC layer no longer receives BFI, the MAC layer clears the BFI counter.
  • the timer used in the beam failure detection is also referred to as a BFD timer in the following.
  • this pre-configured threshold can be regarded as the maximum value of BFI (beam failure instance max).
  • the PHY layer After the MAC layer declares that the beam has failed, the PHY layer starts to detect candidate beams in the pre-configured candidate beam set.
  • the pre-configured candidate beam set includes 16 candidate beams.
  • the PHY layer reports a set of candidate beams that meet the RSRP threshold requirements.
  • the MAC layer selects a new beam as a replacement service beam, and notifies the PHY layer, which sends a random access signal (random access channel, RACH) to the base station. If the UE receives the random access response fed back by the base station, it is considered that the beam recovery is successful, and the beam direction of the new beam can communicate.
  • RACH random access channel
  • each IAB node also serves as a base station device to provide access services for a large number of UEs. Therefore, compared with other beam failure recovery scenarios, the speed of BFR needs to be faster to avoid affecting the services of a large number of UEs.
  • the speed of BFR (or the time elapsed by BFR) is related to many parameters configured on the base station side. For example, these parameters include the length of the BFD timer and the BFD RS period. The longer the length of the BFD timer, the larger the BFD RS period. The slower the BFR. Further, the speed of BFR is also related to the duration of detecting the candidate beam after the beam fails, and the duration of detecting the candidate beam is related to the period of the candidate beam. The longer the period of the candidate beam, the slower the BFR speed. The correlation between the speed of BFR and these parameters can be seen in the schematic diagram shown in FIG. 2.
  • FIG. 2 is a schematic diagram of beam failure detection and BFR.
  • the terminal device detects candidate beam sets and BFD RSs configured by the base station during communication with the base station.
  • the candidate beam set generally includes multiple candidate beams, such as candidate beam 1 and candidate beam 2 shown in FIG. 2.
  • the terminal device After detecting that a beam failure occurs, the terminal device needs to wait for the next opportunity to measure the candidate beam. After the next opportunity to measure the candidate beam comes, the terminal device measures the set of candidate beams to obtain the measurement result. After obtaining the measurement results of the candidate beams, the terminal device needs to wait for the timing of random access signals (random access channel, RO) to initiate the beam failure recovery process.
  • random access signals random access channel, RO
  • the present application provides a method and device for detecting beam failure, which can optimize the beam failure recovery mechanism in the IAB system, for example, to reduce resource overhead and reduce the power consumption of IAB nodes.
  • FIG. 3 is a schematic flowchart of a method 300 for detecting a beam failure provided by this application.
  • the method 300 for detecting beam failure of the present application may be applied to failure detection of an uplink beam.
  • the second node is a subordinate node of the first node, or the second node is a terminal device.
  • the method 300 may also be used for downlink beam failure detection, in which case the second node is a superior node of the first node, or the second node is a home base station (ie, donor).
  • the failure detection of the downlink beam is used as an example to describe the method 300 for detecting beam failure provided by the present application.
  • the second node sends the first type of reference signal and / or the second type of reference signal at a predetermined resource location.
  • the first node measures the first type of reference signal and the second type of reference signal at a predetermined resource location. When the interval between the first type reference signal and the second type reference signal in the time domain is less than a preset time window, the first node does not measure the first type reference signal and the second type reference signal at the same time.
  • the first type of reference signal is a reference signal configured by the second node for beam failure detection.
  • the first type of reference signal includes but is not limited to the following reference signals: channel state information reference signal (channel-state information reference (CSI-RS), phase tracking reference signal (phase noise tracking RS, PTRS), tracking reference signal (tracking RS, TRS), channel sounding reference signal (sounding reference signal, SRS) and synchronization signal block (synchronization signal / physical broadcast channel block, SSB), etc.
  • the second reference signal is used by the first node to demodulate the downlink signal sent by the second node.
  • the second type of reference signal includes demodulation reference signal (DMRS).
  • DMRS demodulation reference signal
  • the second node may schedule a certain lower node (for example, the first node in the embodiment of the present application) to receive a downlink signal at a specific resource location.
  • the second node sends the downlink signal and the demodulation reference signal used to demodulate the downlink signal at the specific resource location.
  • the demodulation reference signal is the second type of reference signal described in this application.
  • the above-mentioned predetermined resource locations include time-domain resource locations, frequency-domain resource locations, and time-frequency resource locations, which are not limited in this application.
  • the first node may measure the demodulation reference signal of the downlink signal at the specific resource location and according to The demodulation reference signal performs downlink beam failure detection. Therefore, from the perspective of the first node, the second type of reference signal is used to demodulate the downlink signal sent by the second node on the one hand, and to perform beam failure detection by the first node on the other hand.
  • the predetermined resource location described in step 310 is the resource location configured by the second node for sending the first type of reference signal.
  • the period of the above-mentioned predetermined resource position may also be regarded as the period of the first type of reference signal.
  • the period of the first reference signal is greater than or equal to the period of the downlink time domain resource between the first node and the second node.
  • the transmission of the first type of reference signal can be reduced, thereby saving resource overhead.
  • the measurement of the first reference signal can be reduced, so that the power consumption of the first node can be reduced.
  • the period of the first type of reference signal may be an integer multiple of the period of the downlink time domain resource between the first node and the second node, for example, n times, n ⁇ 1 and an integer.
  • the aforementioned downlink time domain resources may include downlink subframes, downlink time slots, or downlink symbols.
  • the predetermined resource may be defined by a protocol or a resource configured through signaling, which is not limited in this application.
  • the second node may configure the downlink time domain resource for the first node through high-level signaling, for example, system messages or radio resource control (RRC) signaling.
  • RRC radio resource control
  • the downlink time domain resource is configured by the second node in advance through high-level signaling.
  • the second node sends the first type of reference signal to the first node on the static or semi-static downlink time domain resources.
  • Downlink time-domain resources are usually not dynamic time-domain resources. However, in some cases, flexible subframes can be configured as downlink time-domain resources. This application does not limit the way to determine downlink time-domain resources.
  • the configuration of the first reference signal period can be combined with time division multiplexing (TDD) in long term evolution (LTE) or new radio (NR)
  • TDD time division multiplexing
  • LTE long term evolution
  • NR new radio
  • the period of the uplink and downlink time slot matching in the TDD system may be one of the set ⁇ ms0p5, ms0p625, ms1, ms1p25, ms2, ms2p5, ms5, ms10 ⁇ , where ms0p5 represents 0.5ms and ms0p625 represents 0.625m.
  • ms1 means 1ms
  • ms2 means 2ms
  • ms2p5 means 2.5ms
  • ms5 means 5ms
  • ms10 means 10ms.
  • the period of the first type of reference signal may be n times the period of the downlink time slot in these uplink and downlink time slot configurations, n ⁇ 1 and n is an integer, or the period of the first type of reference signal is configured to be greater than or equal to The period of the downlink time slot in the uplink and downlink time slot configuration. For example, when the subcarrier spacing is 120KHz, the length of one slot is 0.125ms. Assuming that the uplink and downlink time slot configuration between the first node and the second node takes 1.25 ms as a cycle, then one cycle includes 10 time slots.
  • the second time slot and the fifth time slot of the ten time slots are used for downlink transmission
  • the second time slot and the fifth time slot are downlink time slots.
  • the second node may send the first type of reference signal at the position of the second time slot and / or the fifth time slot of any cycle.
  • the second node may only send the first type of reference signal, or only the second type of reference signal, or both the first type of reference signal and the second type of reference signal.
  • the second node when the second node does not send a downlink signal at a predetermined resource location, the second node sends the first type of reference signal at the predetermined resource location.
  • the second node sends the downlink signal and the second type of reference signal used to demodulate the downlink signal at the predetermined resource position, and the first type of reference signal may not be sent.
  • the second node when the second node sends a downlink signal at a predetermined resource position, the second node sends the first type of reference signal in addition to the second type of reference signal and the downlink signal at the predetermined resource position. In other words, at the predetermined resource location, the second node sends the first type of reference signal regardless of whether there is a downlink signal.
  • the second node may not send the first type of reference signal when sending the second type of reference signal and the downlink signal on the predetermined resource.
  • the first type of reference signal and the second type of reference signal may overlap in the time domain, or there may be an offset.
  • the first type of reference signal and the second type of reference signal may be located on the same symbol or symbols in a time slot.
  • the first reference signal and the second reference signal may be located on different symbols in the same time slot.
  • the downlink signal in the embodiment of the present application may also be downlink data.
  • the second node sends the downlink signal and the second reference signal at a predetermined resource location.
  • the first node measures the second reference signal at the predetermined resource location. Further, the first node performs failure detection on the service beam according to the measurement result of the second reference signal. It should be understood that the measurement result of the second reference signal is used to characterize the quality of the second reference signal.
  • the second node does not send a downlink signal to the first node at a predetermined resource location.
  • the second node sends the first type of reference signal.
  • the first node when the first node determines that the predetermined resource location is not scheduled for data transmission, the first node measures the first type of reference signal at the predetermined resource location and based on the measurement of the first type of reference signal As a result, failure detection is performed on the service beam.
  • the second node sends the downlink signal and the second reference signal, and the first reference signal at a predetermined resource location.
  • the first node determines to receive the downlink signal at the predetermined resource location according to the scheduling of the second node, as an implementation manner, the first node measures the second reference signal and the first reference signal. Further, the first node performs failure detection on the service beam according to the measurement results of the first type reference signal and the second type reference signal. As another implementation manner, the first node only measures the second type of reference signal, and does not measure the first type of reference signal.
  • the role of the second node sending the first type of reference signal is to let other subordinate nodes or UEs of the second node measure the first type of reference signal.
  • the other subordinate nodes of the second node may include one or more subordinate nodes other than the first node.
  • the first node measures the first type reference signal and the second type reference signal according to a preset time window. Specifically, when measuring the first type of reference signal, the first node does not measure the second type of reference signal within a preset time window. Or, when the first node measures the second type of reference signal, it does not measure the first type of reference signal within a preset time window.
  • the first node does not measure the time at the preset time when measuring the first reference signal
  • the second type of reference signal in the window or the first node measures the second type of reference signal the first type of reference signal within the preset time window is not measured.
  • the first node measures the first type reference signal and the second type reference signal.
  • the preset time window may be 0, indicating that the first reference signal and the second reference signal overlap in the time domain.
  • the period of the first reference signal is the second reference signal at this time. An integer multiple of the period.
  • the preset time window described in step 310 may also be specified through network configuration or protocol.
  • it can be configured by the superior node or the host base station.
  • the upper-level node can directly configure the time window for the lower-level node.
  • the host base station may configure a time window for the UE.
  • the time window here can be one time slot or several time slots, or one or several symbols, etc., and other values can be configured according to actual measurement requirements.
  • the first node may measure the first reference signal and the second reference when the first reference signal and the second reference signal overlap in the time domain One of the signals.
  • the first node needs to measure the first reference signal and the second reference signal.
  • the first node sends the first reference signal and / or the second reference signal will be described in conjunction with FIG. 3.
  • FIG. 4 is an example in which the second node sends the reference signal to the first node.
  • the period of the backhaul resource between the first node and the second node is configured to 1.25 ms, that is, 10 time slots.
  • the second time slot and the fifth time slot in the 10 time slots are predetermined downlink backhaul (BH) resource positions.
  • BH downlink backhaul
  • the second node sends a downlink signal at a predetermined downlink BH resource location
  • the second node sends a downlink signal and a second reference signal for demodulating the downlink signal at the downlink BH resource location ( For example, DMRS). It should be understood that this downlink signal is not shown in FIG. 4.
  • the second node When the second node does not send a downlink signal at a predetermined downlink BH resource location, the second node sends the first type of reference signal (for example, the RS shown in FIG. 4) at the downlink BH resource location. In other words, when the predetermined downlink BH resource location is not actually scheduled (or scheduled but not used), the second node sends the first type of reference signal at the predetermined downlink BH resource location. When the predetermined downlink BH resource is actually scheduled, the first node receives the downlink signal and the second type of reference signal on the predetermined downlink BH resource.
  • the first type of reference signal for example, the RS shown in FIG.
  • the second node sends the first type of reference at a predetermined downlink BH resource location (for example, the second slot and the fifth slot shown in FIG. 4) according to the period of the first reference signal signal.
  • the first node is scheduled to receive the downlink signal on the second time slot in a certain period, then in the second time slot of the period, the first node can measure the DMRS of the downlink signal Perform beam failure detection without measuring the first reference signal.
  • the second node may not send the first type of reference signal on the time slot in which the first node measures DMRS. This can reduce the transmission of the first type of reference signal and save resource overhead.
  • the period of the first type of reference signal is predetermined (for example, specified in a protocol or configured by the second node), and the first type of reference signal is configured at the downlink backhaul resource location.
  • the second type of reference signal is also located in the downlink backhaul resource position in the time domain.
  • the RS is not transmitted at the position of the downlink BH resource that transmits the DMRS, and it can also be expressed that the RS is replaced by the DMRS. That is, RSs are periodically distributed in the time domain, but at resource locations where DMRSs are sent, the RSs may not be sent, or the RSs are replaced by DMRSs.
  • Figures 5 and 7 below are similar.
  • the period of the first reference signal may be greater than or equal to the period of downlink time domain resources.
  • the period of the first type of reference signal may be greater than or equal to the period of the backhaul resource.
  • the cycle of the first type of reference signal and the cycle of the backhaul resource are equal as an example.
  • An example in which the period of the first type of reference signal is n times the period of the return resource is given below, and n> 1 is an integer.
  • FIG. 5 is another example where the second node sends the reference signal to the first node.
  • n 2 where the backhaul resource takes 10 time slots as a cycle, where the second time slot and the fifth time slot are pre-configured as downlink backhaul resources.
  • the second node sends the first type of reference signal at a resource position configured as a downlink backhaul resource in a static or semi-static manner with a period of 20 slots. If the second node sends a downlink signal to the first node at a position of a downlink backhaul resource, the second node may not send the first type of reference signal at this time.
  • the first node performs beam failure detection by measuring the DMRS of the downlink signal.
  • n the greater the period of the first type of reference signal, and the more sparse the distribution of the first type of reference signal in the time domain, that is, the more frequently the second node sends the first type of reference signal. Low, you can save more resources overhead.
  • the first node measures the demodulation reference signal of the downlink signal (That is, the second type of reference signal) can detect beam failure, and does not even need the second node to send the first type of reference signal, which can save the second node's resource overhead to the greatest extent, and also save the first node to measure the first type Reference signal power consumption.
  • the RS shown in FIG. 5 is not sent at the position of the downlink BH resource that sends the DMRS, and it can also be considered that the RS is replaced by the DMRS.
  • the first node performs failure detection on the service beam according to the measurement result of the first reference signal or the second reference signal.
  • the first node measures the first reference signal and the The second kind of reference signal. It should be understood that the predetermined resource positions are periodically distributed in the time domain. In terms of timing, the first node performs beam failure detection by measuring the first type reference signal and the second type reference signal at the predetermined resource position. However, at a specific resource location, the first node measures one of the first type of reference signal and the second type of reference signal.
  • the second node can implement beam failure detection by sending the first type reference signal and / or the second type reference signal at a predetermined resource location. Specifically, when the second node does not send a downlink signal to the first node at a predetermined resource location, the second node sends the first type of reference signal, so that the first node can measure the first type of reference signal, and then the service beam ( (Specifically, downlink beam) for failure detection.
  • the service beam (Specifically, downlink beam) for failure detection.
  • the second node sends a downlink signal to the first node at a predetermined resource location
  • the first node measures the failure of the service beam by measuring the second type of reference signal used to demodulate the downlink signal.
  • the following describes various situations in which the first node measures the reference signal by the first node to detect the failure of the service beam in various cases where the second node sends the first type of reference signal and / or the second type of reference signal at a predetermined resource location.
  • the second node sends the first type of reference signal at a predetermined resource location, and the first node measures the first type of reference signal.
  • the first node measures the first type of reference signal, and performs the failure detection of the service beam according to the measurement result and the determination condition of the first type of reference signal.
  • Case 1 The design of the technical solution of Case 1 is to consider that the first node may not always have downlink signals to be received. Therefore, it is difficult for the second node to determine a semi-static or static downlink scheduling resource for the first node to measure the downlink Signal DMRS to perform failure detection of the service beam. Therefore, in case 1, at a predetermined resource location, when the second node does not send a downlink signal to the first node, the second node configures the first type of reference signal to the first node to facilitate the first node to measure the first Reference signal to detect beam failure.
  • the second node sends the first node configuration information of the first type of reference signal, and the configuration information includes the period of the first type of reference signal.
  • the first node receives the first type of reference signal according to the configuration information.
  • the first reference signal and the second reference signal have a quasi co-located (QCL) relationship.
  • QCL quasi co-located
  • the upper node uses beam A to send signals, and the lower node receives. If the upper-level node configures that beam A and beam B have a QCL relationship to the lower-level node, then the lower-level node may use the reception parameters of receive beam A when receiving beam B. Or, if the upper node configures the signal A and the signal B to have a QCL relationship to the lower node, the lower node may use the reception parameter of the received signal A when receiving the signal B.
  • a user equipment measures the synchronization signal SSB of the base station, and the UE finds the best reception parameter by adjusting the reception parameter.
  • the base station schedules the UE to receive downlink data, and at the same time informs the UE that there is a QCL relationship between the DMRS and SSB of this downlink data. Then the UE will use the receiving parameters of receiving SSB1 to receive the downlink data scheduled this time.
  • the first type of reference signal and the second type of reference signal have a quasi-co-location relationship. When the first node receives the second type of reference signal, it may use the receiving parameter of the first type of reference signal.
  • the first node when it receives the first type of reference signal, it may use the receiving parameter for receiving the second type of reference signal.
  • the QCL relationship between the first reference signal and the second reference signal may be type A (type A), type B (type B), type C (type C), or type (type D) in the QCL type ), This application is not limited.
  • the second node may configure two first type reference signals for the first node, one of the first type reference signals and the DMRS has a QCL relationship, and the other first type reference signal and the DMRS have no QCL relationship.
  • the first node determines that no downlink signal needs to be received, and the first node measures the first type of reference signal that has a QCL relationship with the DMRS. That is to say, the first node needs to select and measure one of the two first-type reference signals that has a QCL relationship with the DMRS according to whether the DMRS and the two first-type reference signals have a QCL relationship.
  • the second node may also configure more than two first-type reference signals for the first node, or one or more of the two or more first-type reference signals may have a QCL relationship with the DMRS. In this application Not limited.
  • the first node measures the BLER (hypothetical PDCCH BLER) of the hypothetical PDCCH of the first type of reference signal. If the hypothetical PDCCH BLER is greater than the preset threshold, the BFI counter is incremented. When the count of the BFI counter reaches the preset threshold, the first node determines that the service beam fails, and initiates the BFR process.
  • BLER hyper PDCCH BLER
  • the second node sends the downlink signal and the second type of reference signal at a predetermined resource location, and does not send the first type of reference signal.
  • the first node measures the second type of reference signal.
  • the first node measures the second type of reference signal, and performs the failure detection of the service beam according to the measurement result and the determination condition of the second type of reference signal.
  • the first node can specifically measure the following parameters of the second reference signal: block error rate (BLER), reference signal received power (reference signal receiving power, RSRP), and received signal strength indication (Received signal strength (RSSI) and reference signal reception quality (reference signal reception quality (RSRQ), etc., to determine the quality of the second reference signal.
  • BLER block error rate
  • RSRP reference signal received power
  • RSSI received signal strength
  • RSSQ reference signal reception quality
  • the first node may also measure other parameters that can characterize the quality and / or strength of the second reference signal, which is not limited in this application.
  • the determination condition is a condition for evaluating the quality of the reference signal set according to the quality parameter of the reference signal.
  • the determination condition may be set according to the BLER of the reference signal, or according to RSRP, or according to BLER and RSRP, or may be set according to other parameters that can characterize the quality of the reference signal.
  • different determination conditions can be set for different parameters.
  • the determination condition may be that the hypothetical PDCCH of the second reference signal is greater than or equal to 10%, and then BFI is determined to be generated.
  • the determination condition may be that the RSRP of the second reference signal is less than 40%, and it is determined that BFI is generated.
  • 10% and 40% are only examples of threshold values. This judgment condition is also applicable in case 1 and case 3.
  • the second node sends a physical downlink control channel (physical downlink control channel, PDCCH) and a DMRS for demodulating the PDCCH at a predetermined resource location.
  • PDCCH physical downlink control channel
  • the first node measures the DMRS and performs beam failure detection by calculating the BLER of the virtual PDCCH of the DMRS.
  • the first node measures the DMRS hypothetical PDCCH BLER. If the hypothetical PDCCH BLER is greater than the preset threshold, the physical layer of the first node will report a BFI to the MAC layer, and the MAC layer will increase the BFI counter by 1. When the count of the BFI counter reaches the preset threshold, the first node determines that the service beam fails, and initiates the BFR process.
  • the method 300 for detecting beam failure provided by the present application is applied in an IAB scenario, since the IAB node is usually fixed and at the same time, the IAB node provides services for a large number of UEs, therefore, the superior IAB node is likely to Downstream transmission.
  • shortening the BFD period is a way to speed up the BFR, and the BFD period depends on the period of the backhaul resource, the period of the backhaul downlink transmission opportunity, and so on.
  • the cycle of backhauling resources and the cycle of backhauling downlink transmission opportunities are relatively short. Therefore, when the second node sends a downlink signal to the first node, the first node can obviously shorten the BFD cycle by detecting the DMRS of the downlink signal, and thus can increase the speed of the BFR.
  • the second node does not need to send a short-cycle (or dense) first type of reference signal for beam failure detection, so the resource overhead of the second node can also be reduced.
  • the second node sends a downlink signal and a second type of reference signal at a predetermined resource location, and sends the first type of reference signal.
  • the first node measurement only measures the second type of reference signal without measuring the first type of reference signal. Further, the first node performs failure detection of the service beam according to the measurement result of the second reference signal. As another implementation manner, the first node simultaneously measures the first type reference signal and the second type reference signal, and executes the service beam according to the measurement result of the first type reference signal and the measurement result of the second type reference signal Failure detection. I will not repeat them here.
  • the first node measures the DMRS hypothetical PDCCH BLER. If the hypothetical PDCCH BLER is greater than the preset threshold, the physical layer of the first node will report a BFI to the MAC layer, and the MAC layer will increase the BFI counter by 1. If the second node does not send a downlink signal in the next cycle, the first node measures the first type of reference signal (for example, CSI-RS, SSB, etc.). Similarly, if the hypothetical PDCCH BLER of the first reference signal is greater than the preset threshold, the BFI counter is incremented by 1. When the count of the BFI counter reaches the preset threshold, the first node determines that the service beam fails, and initiates the BFR process.
  • the first type of reference signal for example, CSI-RS, SSB, etc.
  • the above method 300 may further include step 330.
  • the second node determines the resource location for sending the first reference signal and the resource location for sending the second reference signal.
  • the resource position of the first type of reference signal determined by the second node and the resource position of the second type of reference signal may be a subset of the predetermined resource positions described in step 310 above.
  • the predetermined resource positions are periodically distributed in the time domain.
  • the resource position determined by the second node to send the first type of reference signal is a part of the resource position in the predetermined resource position, and the resource position determined by the second node to send the second type of reference signal is also a part of the predetermined resource position.
  • Resource location is also a part of the predetermined resource position.
  • the resource location for sending the first type of reference signal and the resource location for sending the second type of reference signal are complementary sets.
  • the predetermined resource location is also the location where the second type of reference signal is sent.
  • the predetermined resource location is the location where the first type of reference signal is sent.
  • the second node sends the first type of reference signal and / or the second type of reference signal at a predetermined resource location, that is, the second node sends the first type of reference signal and the first type of reference signal at the resource location determined in step 330 / Or the second reference signal.
  • the first node detects the candidate beam set while measuring the first type reference signal and the second type reference signal.
  • the candidate beam set is implemented by configuring a reference signal set. Different reference signals in the reference signal set are spatially transmitted through different beam bearers. The spatially different beams are candidate beams. Therefore, when multiple reference signals are included in the reference signal set, there are usually multiple candidate beams, and the multiple candidate beams constitute the candidate beam set.
  • the one or more new beams selected by the first node from the set of candidate beams are referred to as first beams. That is, the first node may select one or more first beams from the candidate beam set according to the measurement result.
  • the first node sends one or more uplink signals to the second node for one or more first beams respectively, and the one or more uplink signals are used to extract from the first or more first beams Determine the first beam of the target.
  • the first beam when the first node selects a first beam from the candidate beam set, the first beam may be regarded as the target first beam, and does not involve the process of determining the target first beam from the plurality of first beams . In the following embodiments involving the determination of the target first beam, there are multiple first beams by default.
  • the uplink signal sent to the second node may include, but is not limited to, a random access channel, a physical uplink control channel (physical uplink control channel, PUCCH), and a physical uplink shared channel (physical uplink, shared channel, PUSCH).
  • a random access channel a physical uplink control channel (physical uplink control channel, PUCCH), and a physical uplink shared channel (physical uplink, shared channel, PUSCH).
  • PUCCH physical uplink control channel
  • PUSCH physical uplink shared channel
  • the first node selects one or more first beams from the candidate beam set and selects contention-free random access (CFRA) resources or contention random access resources corresponding to each of the one or more first beams. (contention based random access, CBRA) to send random access requests. It can be understood that the second node sends multiple random access requests, which can improve the success rate of beam recovery.
  • CFRA contention-free random access
  • CBRA contention based random access
  • the second node detects one or more random access requests sent by the first node, and sends a random access response to the first node.
  • the first node may separately send random access responses to multiple random access requests, or the first node may also send only one random access response to multiple random access requests.
  • the first node monitors the random access response on the control resource set (CORESET) corresponding to each of the multiple random access requests.
  • the first node may choose to determine the first beam corresponding to the first random access response received as the target first beam, or the first node may determine the first beam corresponding to the random access response with the strongest signal strength as the target first beam.
  • a beam For another example, the second node may only send the random access response on the first beam corresponding to the random access response with the strongest received power. In this case, the first node only receives one random access response, and determines the first beam corresponding to the first beam corresponding to the random access response.
  • the second node and the first node After determining the target first beam according to any one of the above methods, the second node and the first node adjust the service beam to the target first beam. In other words, the first node and the second node use the target first beam as a new service beam.
  • the period of the candidate beam is also a factor that affects the speed of the BFR.
  • the larger the period of the candidate beam the longer the waiting time for detecting the candidate beam after a beam failure occurs, thereby also making the BFR elapse longer.
  • the first node may also set a timer.
  • the first node starts the timer immediately after detecting the candidate beam set to obtain the measurement result, and the timer is used as a basis for the first node to determine whether the measurement result of the candidate beam set is valid. Specifically, if the first node detects that the service beam has failed after starting the timer, at this time, if the timer has not timed out, the first node considers that the measurement result of the candidate beam set is still valid. In this case, based on the measurement results, the first node selects one or more new beams that can be used to replace the service beam from the candidate beam set, and directly enters the beam failure recovery process without waiting for the next candidate beam detection opportunity.
  • FIG. 6 is a schematic diagram of an effective window of measurement results of candidate beams.
  • the threshold value of the BFI counter set by the first node is 2, and the default initial value of the BFI counter is 0.
  • the first node measures candidate beam 1 and starts the timer for candidate beam 1 immediately after obtaining the measurement result (denoted as measurement result 1).
  • the second node measures candidate beam 2 and starts the timer for candidate beam 2 immediately after obtaining the measurement result (recorded as measurement result 2).
  • FIG. 6 is a schematic diagram of an effective window of measurement results of candidate beams.
  • the dotted frame after candidate beam 1 represents the effective window of measurement result 1
  • the dotted frame after candidate beam 2 represents the effective window of measurement result 2.
  • the first node can select the beam satisfying the condition from the candidate beam 1 and the candidate beam 2 according to the measurement result 1 and the measurement result 2, and directly initiate when the next random access opportunity (random access channel (RO)) arrives Random access process to recover from beam failure.
  • R random access channel
  • the first node After the first node detects candidate beam 1 and candidate beam 2, the value of the BFI counter reaches a preset threshold value 2, and the first node determines that the serving beam fails. At this time, the first node can only wait for the next candidate beam detection opportunity, and wait for the RO after detecting the candidate beam to obtain the measurement result, and then initiate the random access process to recover the beam failure. It can be seen from this that by setting the effective window of the measurement result of the candidate beam, the first node can be allowed to pre-detect the candidate beam before a beam failure occurs. Therefore, after a beam failure occurs, the first node can directly initiate a beam failure recovery process based on the measurement result of the last candidate beam without waiting for the next candidate beam measurement, which can increase the speed of BFR.
  • the failure detection of the lower beam is used as an example to describe the method 300 for detecting the failure of the beam provided by the present application.
  • the method 300 is similar when applied to the failure detection of the uplink beam.
  • the upper-level node may schedule the lower-level node to send the first type of reference signal at a predetermined resource location.
  • the first type of reference signal includes but is not limited to a sounding reference signal (SRS). If the lower-level node sends an uplink signal at a predetermined resource location, the lower-level node sends the uplink signal and the second type of reference signal at the predetermined resource location.
  • the upper node measures the second reference signal, and performs uplink beam failure detection according to the measurement result of the second reference signal. If the lower-level node does not send an uplink signal at a predetermined resource location, the lower-level node sends the first type of reference signal at the predetermined resource location.
  • the superior node measures the first type of reference signal, and judges the quality of the uplink beam according to the measurement result of the first type of reference signal, and performs failure detection of the uplink beam.
  • the first type of reference signal is sent on the uplink time domain resource.
  • the period of the first type of reference signal is greater than or equal to the period of the uplink time slot between the upper node and the lower node.
  • the period of the first type of reference signal is an integer multiple of the period of the uplink time slot between the upper node and the lower node.
  • FIG. 7 is a schematic diagram of uplink beam failure detection.
  • the subcarrier spacing is 120 kHz, then the time length of one slot is 0.125 ms.
  • the period of the backhaul resource is configured to 1.25ms, that is, 10 time slots.
  • the position of the backhaul resource is repeated in a cycle of 10 time slots.
  • the second time slot and the fifth time slot of the 10 time slots are configured as uplink backhaul resources in a static or semi-static manner.
  • the higher-level node can pass the DMRS of uplink data to perform beam failure detection.
  • the subordinate node sends the first type of reference signal in the second time slot (For example, SRS).
  • the upper node measures the SRS sent by the lower node in the second time slot, and performs uplink beam failure detection according to the measurement result of the SRS.
  • the period of the first type of reference signal may be n times the period of the backhaul resource, n> 1 and an integer.
  • the SRS is not sent at the position of the uplink BH resource where the DMRS is sent as shown in FIG. 7, and it can also be considered that the SRS is replaced by the DMRS.
  • an effective window can also be set for the measurement result of each candidate beam, so that the beam recovery process can be quickly initiated when a beam failure occurs.
  • the present application also provides a method 400 for detecting a beam failure.
  • the method 400 includes the following steps 410-420.
  • the first node measures the demodulation reference signal sent by the second node to demodulate the downlink signal, and obtains the measurement result of the demodulation reference signal DMRS.
  • the first node performs beam failure detection according to the measurement result of the demodulation reference signal.
  • the first node can perform beam failure detection by measuring the DMRS, and the first node does not even need to be configured for beam
  • the reference signal for failure detection such as the first reference signal in method 300.
  • the DMRS is only sent when the second node has downlink data sent to the first node, there is no fixed period. Therefore, in order to ensure the beam failure detection of the first node, it can be specified by the protocol or by the second The node configures periodically distributed resource positions in the time domain through high-level signaling, that is, predetermined resource positions.
  • the second node may not send a reference signal for beam failure detection, and the first node measures the DMRS of the downlink signal to perform beam failure detection.
  • the second node When the second node does not send a downlink signal at a predetermined resource location, the second node sends a reference signal for beam failure detection for the first node to measure, which can ensure beam failure detection.
  • This solution is the same as the method 300 introduced above, and will not be repeated here.
  • the method 300 for detecting beam failure provided by the present application has been described in detail above, and the apparatus for detecting beam failure provided by the present application will be described below.
  • FIG. 8 is a schematic structural block diagram of a communication device 500 provided by the present application.
  • the communication device 500 includes a transceiver unit 510 and a processing unit 520.
  • the transceiver unit 510 is configured to measure the first type of reference signal and the second type of reference signal sent by the second node at a predetermined resource location, the first type of reference signal is used for beam failure detection, and the second type The reference signal is used to demodulate the downlink signal sent by the second node.
  • the unit 510 uses Measuring the first reference signal and the second reference signal at different times;
  • the processing unit 520 is configured to detect the failure of the service beam according to the measurement result of the first reference signal or the second reference signal.
  • the communication device 500 may correspond to the method 300 for detecting beam failure provided in this application and the first node in each embodiment.
  • the units included in the communication device 500 are respectively used to implement the corresponding operations and / or processes performed by the first node in the method 300 and its embodiments.
  • the communication device 500 may also be a chip or an integrated circuit configured in the first node.
  • the transceiver unit 510 may be composed of a receiving unit and a sending unit.
  • the transceiver unit 520 may be a transceiver, and the processing unit 520 may be a processor.
  • the transceiver may include a transmitter and a receiver, and has both receiving and transmitting functions.
  • the transceiver unit 510 may also be an input-output interface or an input-output circuit.
  • FIG. 9 is a schematic structural block diagram of a communication device 600 provided by the present application.
  • the communication device 600 includes a transceiver unit 610 and a processing unit 620.
  • the processing unit 610 is configured to determine a resource position for sending a first type of reference signal and a resource position for sending a second type of reference signal.
  • the first type of reference signal is used for beam failure detection, and the second type of reference signal is used for Demodulate the downlink signal sent by the second node;
  • the transceiver unit 610 is configured to send the first type of reference signal and / or the second type of reference signal at the determined resource location.
  • the communication device 600 may correspond to the method 300 for detecting beam failure provided in this application and the second node in each embodiment.
  • the units included in the communication device 600 are respectively used to implement the corresponding operations and / or processes performed by the second node in the method 300 and its embodiments.
  • the communication device 600 may also be a chip or an integrated circuit configured in the second node.
  • the transceiver unit 620 may be composed of a receiving unit and a sending unit.
  • the processing unit 610 may be a processor.
  • the transceiver unit 620 may be a transceiver.
  • the transceiver may include a transmitter and a receiver, and has both receiving and transmitting functions.
  • the transceiver unit 620 may also be an input-output interface or an input-output circuit.
  • FIG. 10 is a schematic structural diagram of a communication device 700 provided by the present application.
  • the communication device 700 includes one or more processors 701, one or more memories 702, and one or more transceivers 703.
  • the processor 701 is used to control the transceiver 703 to send and receive signals
  • the memory 702 is used to store a computer program
  • the processor 701 is used to call and run the computer program from the memory 702 to execute the method 300 and the beam detection failure provided by the present application The corresponding process and / or operation performed by the first node in the embodiment.
  • the communication device 700 may correspond to the first node in the method embodiment.
  • the processor 701 of the communication device 700 may correspond to the processing unit 520 shown in FIG. 8
  • the transceiver 703 may correspond to the transceiver unit 510 shown in FIG. 8.
  • the processor 701 is used to perform step 320 shown in FIG. 3.
  • the transceiver 703 is used to perform the step 310 of receiving the first type reference signal and the second type reference signal from the second node in FIG. 3.
  • the processor 701 is further configured to perform a step of measuring the first type reference signal and / or the second type reference signal, and perform a step of determining whether a BFI is generated according to the measurement result of the first type reference signal and / or the second type reference signal. , And the step of determining the failure of the service beam.
  • the processor 701 is further configured to determine whether a downlink signal needs to be received at a predetermined resource location according to the scheduling of the second node.
  • the transceiver 703 is also used to perform the step of receiving candidate beam sets from the second node.
  • the processor 701 is further configured to perform the step of measuring the candidate beam set and the step of selecting the first beam from the candidate beam set according to the measurement result of the candidate beam.
  • the processor 701 is also used to execute a step of starting a timer and a step of determining whether the timer times out.
  • the processor 701 is further configured to perform the step of determining one or more first beams from the set of candidate beams according to the measurement result of the candidate beam when it is determined that the timer has not timed out.
  • FIG. 11 is a schematic structural diagram of a communication device 800 provided by the present application.
  • the communication device 800 includes one or more processors 801, one or more memories 802, and one or more transceivers 803.
  • the processor 801 is used to control the transceiver 803 to send and receive signals
  • the memory 802 is used to store a computer program
  • the processor 801 is used to call and run the computer program from the memory 802 to perform the method 300 and the beam detection failure provided by the present application The corresponding process and / or operation performed by the second node in the embodiment.
  • the processor 801 of the communication device 800 may correspond to the processing unit 610 shown in FIG. 9, and the transceiver 803 may correspond to the transceiver unit 620 shown in FIG. 9.
  • the processor 801 is used to perform step 330 shown in FIG. 3.
  • the transceiver 803 is used to perform the step 310 of sending the first type reference signal and / or the second type reference signal in FIG. 3.
  • the processor 801 is further configured to perform a step of scheduling the first node to receive the downlink signal at a predetermined resource location.
  • the transceiver 803 is also used to perform the step of transmitting the first type of reference signal at a predetermined resource location according to the schedule of the processor, or not to transmit the first type of reference signal at a predetermined resource, or to execute the predetermined type of scheduling according to the schedule of the processor The step of sending the downlink signal and the second reference signal at the resource location.
  • the present application provides a computer-readable storage medium that stores computer instructions, and when the computer instructions run on a computer, the computer is caused to execute the method 300 for detecting beam failure according to an embodiment of the present application The corresponding operations and / or processes performed by the first node.
  • the present application also provides a computer program product, the computer program product includes computer program code, and when the computer program code runs on a computer, the computer is executed by the first node in the method 300 for detecting a beam failure according to an embodiment of the present application Corresponding operations and / or processes.
  • the present application also provides a chip, including a processor.
  • the processor is used to call and run a computer program stored in the memory to perform the corresponding operation and / or process performed by the first node in the method 300 for detecting beam failure according to an embodiment of the present application.
  • the chip further includes a memory, which is connected to the processor.
  • the processor is used to read and execute the computer program in the memory.
  • the chip further includes a communication interface, and the processor is connected to the communication interface.
  • the communication interface is used to receive signals and / or data that need to be processed, and the processor obtains the signals and / or data from the communication interface and processes the signals and / or data.
  • the communication interface may be an input-output interface, and may specifically include an input interface and an output interface.
  • the communication interface may be an input-output circuit, and may specifically include an input circuit and an output circuit.
  • the present application provides a computer-readable storage medium.
  • the computer-readable storage medium stores computer instructions.
  • the computer instructions run on the computer, the computer executes the method 300 for detecting a beam failure according to an embodiment of the present application.
  • the present application also provides a computer program product, the computer program product includes computer program code, and when the computer program code runs on a computer, the computer is executed by the second node in the method 300 for detecting a beam failure according to an embodiment of the present application Corresponding operations and / or processes.
  • the present application also provides a chip, including a processor.
  • the processor is used to call and run a computer program stored in the memory to perform the corresponding operation and / or process performed by the second node in the method 300 for detecting beam failure according to an embodiment of the present application.
  • the chip further includes a memory, which is connected to the processor.
  • the processor is used to read and execute the computer program in the memory.
  • the chip further includes a communication interface, and the processor is connected to the communication interface.
  • the communication interface is used to receive signals and / or data that need to be processed, and the processor obtains the signals and / or data from the communication interface and processes the signals and / or data.
  • the communication interface may be an input-output interface, and may specifically include an input interface and an output interface.
  • the communication interface may be an input-output circuit, specifically including an input circuit and an output circuit.
  • the memory and the memory involved in the foregoing embodiments may be physically independent units, or the memory may be integrated with the processor.
  • the processor may be a central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more technologies for controlling the application Integrated circuits for program execution.
  • the processor may be a digital signal processor device, a microprocessor device, an analog-to-digital converter, a digital-to-analog converter, or the like.
  • the processor may allocate the functions of control and signal processing of the terminal device or the network device among these devices according to their respective functions.
  • the processor may have a function of operating one or more software programs, and the software programs may be stored in the memory.
  • the functions of the processor may be implemented by hardware, or may be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the memory may be read-only memory (ROM), other types of static storage devices that can store static information and instructions, random access memory (RAM) or other types of information and instructions that can be stored
  • Dynamic storage devices can also be electrically erasable programmable read-only memory (electrically erasable programmable-read-only memory (EEPROM), read-only compact disc (compact disc read-only memory, CD-ROM) or other optical disc storage, optical disc storage ( (Including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media, or other magnetic storage devices, or can be used to carry or store desired program code in the form of instructions or data structures and can Any other media accessed by the computer, etc.
  • EEPROM electrically erasable programmable read-only memory
  • CD-ROM compact disc read-only memory
  • optical disc storage (Including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media, or other magnetic storage devices
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be other division manners in actual implementation.
  • multiple units or components can be combined or integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may not be physically separated, and the components displayed as units may not be physical units, that is, they may be located in one place, or may be distributed on multiple network units. Part or all of the units may be selected according to actual needs to achieve the purpose of the technical solution of the present application.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application essentially or part of the contribution to the existing technology or part of the technical solution can be embodied in the form of a software product, the computer software product is stored in a storage medium, including Several instructions are used to enable a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program codes .

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Abstract

本申请提供一种检测波束失败的方法和装置，可以优化波束失败恢复机制。该方法包括：第一节点在预定的资源位置上，测量第二节点发送的第一种参考信号和第二种参考信号，第一种参考信号用于进行波束失败检测，第二种参考信号用于解调第二节点发送的下行信号，所述第一种参考信号和所述第二种参考信号在时域上的间隔小于预设的时间窗口时，所述第一节点不同时测量所述第一种参考信号和所述第二种参考信号；第一节点根据第一种参考信号或第二种参考信号的测量结果，进行服务波束的失败检测。

Description

检测波束失败的方法和装置
本申请要求于2019年10月31日提交中国国家知识产权局、申请号为201811289333.5、申请名称为“检测波束失败的方法和装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及接入回传一体化IAB技术领域，尤其涉及一种IAB网络中检测波束失败的方法和装置。
背景技术
波束赋形技术作为新空口(new radio,NR)的关键技术之一，可以有效对抗路径损耗，从而提升网络的覆盖范围和容量。通常，波束与通信设备之间对准的越好，该波束提供的信号增益越大。但是，由于一些因素的变化或影响，例如信道的突然波动、故障或中断，建筑物的遮挡等，有时会发生波束失败。发生波束失败之后，通信设备需要将当前的故障波束切换到其它可用的波束，以进行波束失败恢复(beam failure recovery,BFR)。
在接入回传一体化(integrated access and backhaul,IAB)系统中，IAB节点相比长期演进(long term evolution，LTE)中的中继，部署更加的复杂，可以支持多跳中继。并且，每个IAB节点同时作为基站设备，为大量的用户设备提供接入服务。如果IAB节点发生波束失败，将会对大量用户的业务造成影响，因此需要以很快的速度完成波束失败恢复。
而在现有的波束失败恢复的机制中，波束失败恢复的速度与诸多因素有关，如果仅仅只考虑提升波束失败恢复的速度，又可能带来IAB系统在其它方面性能的下降，例如资源开销增大，时延增加，IAB节点的功耗增大等。因此，如何优化IAB系统中波束失败恢复机制对IAB的性能是需要考虑的问题。
发明内容
本申请提供一种检测波束失败的方法和装置，可以优化波束失败恢复机制。
第一方面，本申请提供一种检测波束失败的方法，该方法包括：第一节点在预定的资源位置上，测量第二节点发送的第一种参考信号和第二种参考信号，第一种参考信号用于进行波束失败检测，第二种参考信号用于解调第二节点发送的下行信号，其中，第一种参考信号和第二种参考信号在时域上的间隔小于预设的时间窗口时，所述第一节点不同时测量所述第一种参考信号和所述第二种参考信号；第一节点根据第一种参考信号或第二种参考信号的测量结果，进行服务波束的失败检测。
可选地，该下行信号也可以为下行数据。
应理解，预定的资源位置可以包括由协议定义或者由上级节点预先配置等方式，本申请中不作限定。另外，这里的资源包括时域资源、频域位置和时频资源。
需要说明的是，第一种参考信号和第二种参考信号在时域上的间隔小于预设的时间窗口，包括第一种参考信号和第二种参考信号在时域上重叠。
本申请的技术方案可用于下行波束的失败检测，也可以用于上行波束的失败检测。以下行波束的失败检测作为示例时，第二节点为第一节点的上级节点，或者说，第一节点为第二节点的下级节点。
在本申请提供的技术方案中，第二节点在预定的资源位置上有下行信号发送时，第一节点可以通过测量该下行信号的解调参考信号(即，第二种参考信号)进行波束失败检测，不会额外地增加第一节点的功耗。此时，由于第一节点通过测量第二种参考信号能够进行波束失败检测，第二节点可以不发送第一种参考信号，因此也可以降低第二节点的资源开销。而第二节点在预定的资源位置上没有下行信号发送时，第二节点在预定的资源位置上发送第一种参考信号，第一节点通过测量第一种参考信号进行波束失败测量，可以在第一节点在没有下行信号接收的情况下，保证波束失败检测。根据本申请提供的技术方案进行波束失败检测，可以优化波束失败恢复的机制。例如，降低资源开销，减小IAB节点的功耗。
结合第一方面，在第一方面的某些实现方式中，第一节点在预定的资源位置上，测量第二节点发送的第一种参考信号和第二种参考信号，包括：第一节点根据第二节点的调度，确定在预定的资源位置上接收下行信号时，第一节点测量第二种参考信号且不测量第一种参考信号；或者，第一节点确定预定的资源位置未被调度用于下行信号的传输时，第一节点测量第一种参考信号。
换句话说，第一节点确定某个预定的资源位置上有下行信号时，第一节点通过测量用于解调该下行信号的解调参考信号，也即第二种参考信号，进行波束失败检测。而第一节点确定某个预定的资源位置上没有下行信号时，第一节点通过测量第一种参考信号进行波束失败检测。
结合第一方面，在第一方面的某些实现方式中，第一节点根据该第一种参考信号或第二种参考信号的测量结果，进行服务波束的失败检测，包括：第一节点根据第一种参考信号或第二种参考信号的测量结果，以及判定条件，进行所述服务波束的失败检测，其中，所述判定条件是根据参考信号的质量参数设定的用于评估参考信号的质量的条件。
需要说明的是，第一节点在某个预定的资源位置上测量第一种参考信号，则第一节点根据第一种参考信号的测量结果和判定条件进行服务波束的失败检测。第一节点在某个预定的资源位置上测量第二种参考信号，则第一节点根据第二种参考信号的测量结果和判定条件进行服务波束的失败检测。
结合第一方面，在第一方面的某些实现方式中，该方法还包括：第一节点检测候选波束集合，得到候选波束的测量结果，其中，所述候选波束的测量结果用于指示候选波束的质量；第一节点开启定时器；第一节点判定所述服务波束失败之后，该方法还包括：第一节点确定定时器是否超时，并在该定时器未超时的情况下根据所述候选波束的测量结果，从候选波束集合中确定可用于替换服务波束的一个或多个第一波束。
第一节点在检测候选波束集合得到测量结果后立即开启定时器，该定时器作为第一节点判断该候选波束集合的测量结果是否有效的依据。第一节点在开启定时器之后，如果第一节点检测到服务波束发生失败，此时，如果定时器还没有超时，则第一节点认为该候选 波束集合的测量结果依然有效。这种情况下，第一节点以候选波束集合的测量结果作为依据，从候选波束集合中选择可用于替换服务波束的一个或多个新波束，并直接进入波束失败恢复流程，不需要等待下一次的候选波束检测时机，可以加快BFR的速度。
结合第一方面，在第一方面的某些实现方式中，第一种参考信号和第二种参考信号在时域上的间隔小于预设窗口时，第一节点不同时测量第一种参考信号和第二种参考信号，包括：第一节点测量第二种参考信号时，在预设的时间窗口内不对第一种参考信号进行测量；或者，第一节点测量第一种参考信号时，在预设的时间窗口内不对第二种参考信号进行测量。
结合第一方面，在第一方面的某些实现方式中，所述第一种参考信号的资源位置在时域上是周期分布的，所述第一种参考信号的时域资源的周期大于或等于第一节点和第二节点之间的下行时域资源的周期。可选地，第一种参考信号的时域资源的周期是第一节点和第二节点之间的下行时域资源的周期的整数倍。
第二方面，本申请提供一种检测波束失败的方法，该方法包括：第二节点确定发送第一种参考信号的资源位置和发送第二种参考信号的资源位置，第一种参考信号用于进行波束失败检测，第二种参考信号用于解调第二节点发送的下行信号；第二节点在所述确定的资源位置上发送第一种参考信号和/或第二种参考信号。
结合第二方面，在第二方面的某些实现方式中，第二节点在确定的资源位置上发送第一种参考信号和/或第二种参考信号，包括：第二节点调度第一节点在所述确定的资源位置上接收下行信号时，第二节点在发送第二种参考信号的资源位置上不发送第一种参考信号。
第二节点在确定的资源位置上调度下行信号传输时，第一节点可以通过测量该下行信号的解调参考信号，也即，第二种参考信号，进行波束失败检测。此时，第二节点可以在第二种参考信号的资源位置上不发送第一种参考信号，以节省资源开销。
结合第二方面，在第二方面的某些实现方式中，所述第一种参考信号的资源位置在时域上是周期分布的，所述第一种参考信号的时域资源的周期大于或等于第一节点和第二节点之间的下行时域资源的周期。可选地，第一种参考信号的时域资源的周期是第一节点和第二节点之间的下行时域资源的周期的整数倍。
第三方面，本申请提供一种检测波束失败的装置，该装置具有第一方面或第一方面的任意可能的实现方式中的第一节点的功能。这些功能可以通过硬件实现，或者，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与这些功能相对应的单元。
第四方面，本申请提供一种检测波束失败的装置，该装置具有第二方面或第二方面的任意可能的实现方式中的第二节点的功能。这些功能可以通过硬件实现，或者，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与这些功能相对应的单元。
第五方面，本申请提供一种通信设备，包括收发器、处理器和存储器。处理器用于控制收发器收发信号，存储器用于存储计算机程序，处理器用于调用并运行存储器中存储的计算机程序，使得通信设备执行第一方面或第一方面的任意可能的实现方式中的方法。
第六方面，本申请提供一种通信设备，包括收发器、处理器和存储器。处理器用于控制收发器收发信号，存储器用于存储计算机程序，处理器用于调用并运行存储器中存储的计算机程序，使得通信设备执行第二方面或第二方面的任意可能的实现方式中的方法。
第七方面，本申请提供一种计算机可读存储介质，该计算机可读存储介质中存储有指令，当指令在计算机上运行时，使得计算机执行上述第一方面或第一方面的任意可能的实现方式中的方法。
第八方面，本申请提供一种计算机可读存储介质，该计算机可读存储介质中存储有指令，当指令在计算机上运行时，使得计算机执行第二方面或第二方面的任意可能的实现方式中的方法。
第九方面，本申请提供一种本申请提供一种芯片，包括处理器。处理器用于读取并执行存储器中存储的计算机程序，以执行上述第一方面或第一方面的任意可能的实现方式中的方法。
可选地，该芯片该包括存储器，该存储器与该处理器连接。进一步可选地，该芯片还包括通信接口，处理器与该通信接口连接。通信接口用于接收需要处理的信号和/或数据，处理器从该通信接口获取该信号和/或数据，并对该信号和/或数据进行处理，并通过该通信接口输出处理结果。
第十方面，本申请提供一种芯片，包括处理器。处理器用于读取并执行存储器中存储的计算机程序，以执行第二方面或第二方面的任意可能的实现方式中的方法。
可选地，该芯片该包括存储器，该存储器与该处理器连接。进一步可选地，该芯片还包括通信接口，处理器与该通信接口连接。通信接口用于接收需要处理的信号和/或数据，处理器从该通信接口获取该信号和/或数据，并对该信号和/或数据进行处理，并通过该通信接口输出处理结果。
可选的，上述的存储器与存储器可以是物理上相互独立的单元，或者，存储器也可以和处理器集成在一起。
第十一方面，本申请提供一种计算机程序产品，该计算机程序产品包括计算机程序代码，当计算机程序代码在计算机上运行时，使得计算机执行上述第一方面或第一方面的任意一种可能的实现方式中的方法。
第十二方面，本申请提供一种计算机程序产品，该计算机程序产品包括计算机程序代码，当计算机程序代码在计算机上运行时，使得计算机执行第二方面或第二方面的任意可能的实现方式中的方法。
在本申请提供的技术方案中，第二节点在预定的资源位置上有下行信号发送时，第一节点可以通过测量该下行信号的解调参考信号(即，第二种参考信号)进行波束失败检测，不会额外地增加第一节点的功耗。此时，由于第一节点通过测量第二种参考信号能够进行波束失败检测，第二节点可以不发送第一种参考信号，因此也可以降低第二节点的资源开销。而第二节点在预定的资源位置上没有下行信号发送时，第一节点通过测量第一种参考信号进行波束失败测量，可以保证第一节点在没有下行信号接收的情况下，也可以进行波束失败检测。根据本申请提供的技术方案进行波束失败检测，可以优化波束失败恢复的机制。例如，降低资源开销，减小IAB节点的功耗。
附图说明
图1为适用于本申请实施例的通信系统的结构示意图。
图2是波束失败检测以及进行BFR的示意图。
图3是本申请提供的检测波束失败的方法300的示意性流程图。
图4是第二节点向第一节点发送参考信号的示例。
图5是第二节点向第一节点发送参考信号的另一个示例。
图6是候选波束的测量结果的有效窗口的示意图。
图7中(1)和(2)是上行波束失败检测的示意图。
图8是本申请提供的通信装置500的示意性结构框图。
图9是本申请提供的通信装置600的示意性结构框图。
图10是本申请提供的通信设备700的示意性结构图。
图11是本申请提供的通信设备800的示意性结构图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
下面将结合附图，对本申请中的技术方案进行描述。
本申请中所有节点、消息的名称仅仅是本申请为了描述方便而设定的名称，在实际网络中的名称可能不同，不应该理解本申请限定各种节点、消息的名称。相反，任何具有和本申请中用到的节点或消息具有相同或类似功能的名称都视作本申请的方法或等效替换，都在本申请的保护范围之内，以下不再赘述。
考虑到未来无线网络的高带宽，5G新空口(new radio,NR)考虑引入接入回传一体化(integrated access and backhaul,IAB)方案以进一步降低部署成本，提高部署灵活性，并由此引入一体化的接入和回传的中继。本申请将支持IAB方案的中继节点称为IAB节点(IAB node)以和长期演进(long term evolution,LTE)的中继进行区分。其中，包含IAB节点的系统又称为中继系统。
为了更好地理解本申请实施例公开的方法以及装置，首先对本申请实施例中使用的网络架构进行描述。请参阅图1，图1为适用于本申请实施例的通信系统的结构示意图。
需要说明的是，本申请实施例提及的通信系统包括但不限于：窄带物联网(narrow band-internet of things，NB-IoT)系统、无线局域网(wireless local access network,WLAN)系统、LTE系统、下一代5G移动通信系统或者5G之后的通信系统，例如NR、设备到设备(device to device，D2D)通信系统等。
图1所示为IAB系统。一个IAB系统至少包括一个基站100，以及基站100所服务的一个或多个终端设备(terminal)101，一个或多个中继节点(也即，IAB节点)110，以及IAB节点110所服务的一个或多个终端设备111。通常，基站100被称为宿主基站(donor next generation node B，DgNB)，IAB节点110通过无线回传链路113连接到基站100。宿主基站在本申请中也称为宿主节点，即，Donor节点。
基站100包括但不限于：演进型节点B(evolved node base，eNB)、无线网络控制器(radio network controller，RNC)、节点B(node B，NB)、基站控制器(base station controller，BSC)、基站收发台(base transceiver station,BTS)、家庭基站(home evolved NodeB，或home node B，HNB)、基带单元(baseband Unit，BBU)、演进的(evolved LTE,eLTE)基站、NR基站(next generation node B,gNB)等。
终端设备包括但不限于：用户设备(user equipment,UE)、移动台、接入终端、用户 单元、用户站、移动站、远方站、远程终端、移动设备、终端、无线通信设备、用户代理、无线局域网(wireless local access network,WLAN)中的站点(station,ST)、蜂窝电话、无绳电话、会话启动协议(session initiation protocol,SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字处理(personal digital assistant,PDA)、具有无线通信功能的手持设备、计算设备、连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备、未来5G网络中的移动台以及未来演进的公共陆地移动网络(public land mobile network,PLMN)网络中的终端设备等中的任意一种。IAB节点是中继节点的特定的名称，不对本申请的方案构成限定，可以是一种具有转发功能的上述基站或者终端设备中的一种，也可以是一种独立的设备形态。
一体化的接入和回传系统还可以包括多个其它IAB节点，例如IAB节点120和IAB节点130。IAB节点120是通过无线回传链路123连接到IAB节点110以接入到网络的。IAB节点130是通过无线回传链路133连接到IAB节点110以接入到网络的。IAB节点120为一个或多个终端设备121服务，IAB节点130为一个或多个终端设备131服务。图1中，IAB节点110和IAB节点120都通过无线回传链路连接到网络。在本申请中，所述无线回传链路都是从中继节点的角度来看的，例如无线回传链路113是IAB节点110的回传链路，无线回传链路123是IAB节点120的回传链路。如图1所示，一个IAB节点，如120，可以通过无线回传链路，如123，连接另一个IAB节点110，从而连接到网络。而且，中继节点可以经过多级无线中继节点连接到网络。应理解，本申请中用IAB节点仅仅出于描述的需要，并不表示本申请的方案仅用于NR的场景，在本申请中，IAB节点可以泛指任何具有中继功能的节点或设备，本申请中的IAB节点和中继节点的使用应理解具有相同的含义。
为描述上的方便，首先定义本申请中用到的基本术语或概念。
上级节点：提供无线回传链路资源的节点，例如110，称为IAB节点120的上级节点，
下级节点：使用回传链路资源向网络进行数据传输，或者接收来自网络的数据的节点。例如，120称为中继节点110的下级节点。这里所说的网络可以为核心网或者其它接入网之上的网络，例如因特网，专网等。
接入链路：UE和IAB node或IAB宿主节点(IAB donor)之间的链路。或者，接入链路包括某个节点和它的下级节点进行通信时所使用的无线链路。接入链路包括上行接入链路和下行接入链路。上行接入链路也被称为接入链路的上行传输，下行接入链路也被称为接入链路的下行传输。
回传链路：IAB node和IAB子节点(IAB child node)或者IAB父节点(IAB parent node)之间的链路。回传链路包括和IAB子节点或者IAB父节点的下行传输的链路，以及和IAB子节点或者IAB父节点的上行传输的链路。IAB节点向IAB父节点进行数据传输，或者接收IAB子节点的上行传输被称为回传链路的上行传输。IAB节点接收IAB父节点的数据传输，或者向IAB子节点进行的数据传输被称为回传链路的下行传输。为了对UE和IAB节点进行区分，IAB节点与IAB父节点之间的回传链路被又称为上级回传链路(parent BH)，而IAB节点与IAB子节点之间的回传链路被称为下级回传链路(child BH)。
通常，下级节点可以被看作是上级节点的一个终端设备。应理解，图1所示的一体化接入和回传系统中，一个IAB节点连接一个上级节点。但是在未来的中继系统中，为了提 高无线回传链路的可靠性，一个IAB节点，如120，可以有多个上级节点同时为一个IAB节点提供服务，如图1中的IAB节点130还可以通过回传链路134连接到IAB节点120，即，IAB节点110和IAB节点120都视为IAB节点130的上级节点。IAB节点110,120，130的名称并不限制其所部署的场景或网络，可以是比如relay，RN等任何其他名称。本申请使用IAB节点仅是方便描述的需要。
在图1中，无线链路102,112,122,132,113,123,133,134可以是双向链路，包括上行和下行传输链路，特别地，无线回传链路113,123,133,134可以用于上级节点为下级节点提供服务，如上级节点100为下级节点110提供无线回传服务。应理解，回传链路的上行和下行可以是分离的，即，上行链路和下行链路不是通过同一个节点进行传输的。所述下行传输是指上级节点，例如节点100，向下级节点，例如节点110，传输信息或数据，上行传输是指下级节点，例如节点110，向上级节点，例如节点100，传输信息或数据。所述节点不限于是网络节点还是终端设备，例如，在D2D场景下，终端设备可以充当中继节点为其他终端设备服务。无线回传链路在某些场景下又可以是接入链路，如回传链路123对节点110来说也可以被视作接入链路，回传链路113也是节点100的接入链路。应理解，上述上级节点可以是基站，也可以是中继节点，下级节点可以是中继节点，也可以是具有中继功能的终端设备，如D2D场景下，下级节点也可以是终端设备。
图1所示的中继节点，例如110,120,130，可以有两种存在的形态：一种是作为一个独立的接入节点存在，可以独立管理接入到中继节点的终端设备，此时的中继节点通常具有独立的物理小区标识(physical cell identifier，PCI)，这种形态的中继通常需要有完全的协议栈功能。比如无线资源控制(radio resource control，RRC)的功能，这种中继通常被称为层3中继。而另一种形态的中继节点和Donor节点，如Donor eNB，Donor gNB，可以具有相同或不同的PCI，用户的管理是由宿主基站，如Donor节点来进行管理的，这种中继通常被称为层2中继。层2中继在NR的控制和承载分离(central unit and Distributed unit,CU-DU)架构下通常作为基站DgNB的DU而存在，通过(F1application protocol,F1-AP)接口或者隧道协议和CU进行通信，其中隧道协议例如可以是通用分组无线服务隧道协议(general packet radio service tunneling protocol,GTP)协议，不再赘述。Donor节点是指通过该节点可以接入到核心网的节点，或者是无线接入网的一个锚点基站，通过该锚点基站可以接入到网络。锚点基站负责接收核心网的数据并转发给中继节点，或者接收中继节点的数据并转发给核心网。通常，把中继系统中的Donor节点称为IAB Donor，即宿主节点，本申请中两个名词可能会交替使用，应理解，不应该将IAB donor和宿主节点理解成是具有不同功能的实体或网元。
为了便于理解本申请的技术方案，首先对本申请实施例中涉及的波束失败和波束失败恢复作简单说明。
波束赋形作为第五代移动通信系统(the 5th generation,5G)的关键技术之一，可以有效对抗路径损耗，从而提升网络覆盖范围和容量。通常，波束与用户之间对准的越好，该波束提供的信号的增益越大。但是在一些应用场景下可能会发生波束失败。例如，在5G的毫米波系统中，信道波动较为剧烈，可能导致两个通信设备之间(例如，基站和终端设备)的波束失败。又例如，建筑物的遮挡，也会导致两个通信设备之间的波束失败等。以基站和终端设备的通信为例来说，发生波束失败的情况下，由于基站和终端设备之间的波 束未对准，终端设备将不能解码任何下行链路的信号，而基站也将不能解码任何上行链路的信号。如果这些故障重复出现，将陷入无线链路故障(radio link failure,RLF)。当下行波束发生失败时，如果UE具有替代或可用其它波束来替换当前失败的服务波束，则可能有机会避免由波束失败引起的RLF。为此，在发生波束失败之后，则进行波束失败恢复。
波束失败恢复(beam failure recovery,BFR)是指根据候选波束的测量结果，将当前发生失败的服务波束调整到候选波束中可用的波束。对于下行波束，波束失败由终端设备进行检测，并且波束失败恢复也由终端设备触发。而上行波束的失败可以由基站设备进行检测，波束失败恢复也由基站设备触发。通常意义上，波束失败恢复主要是指下行波束的恢复。
波束失败的检测和恢复主要包括如下流程。
1、波束失败检测的配置。
基站设备配置波束失败检测(beam failure detection,BFD)参考信号(reference signal,RS)集合。在一个用户设备(user equipment,UE)工作的带宽上，BFD RS集合中一般包括两个RS。
2、波束失败检测的执行。
波束失败是基于假想(hypothetical)的下行物理控制信道(physical downlink control channel,PDCCH)的块差错率(block error rate,BLER)进行判定的。在现有的波束失败检测机制中，UE的PHY层基于假想的PDCCH，确定该PDCCH的BLER≥10％，则PHY层向MAC层上报一次波束失败实例(beam failure instance,BFI)。PHY层的检测周期为上述两个RS的周期中最短的一个。在每个检测周期一开始，MAC层启动基站设备通过RRC消息配置的定时器。定时器到时之前，如果MAC层再次接收到PHY层上报的BFI，则定时器重置，并且BFI计数器加1。定时器到时之前，如果MAC层没有再收到BFI，则MAC层将BFI计数器清零。
可替换地，在下文中也将波束失败检测时使用的定时器称作BFD的定时器。
3、波束失败的判定。
当BFI累积到一个预配置的门限值时，MAC层通过RRC消息向基站申明波束失败。其中，这个预配置的门限值可以认为是BFI的最大值(beam failure instance max count)。
4、波束失败恢复请求的发送。
MAC层申明波束失败后，PHY层开始检测预配置的候选波束集合中的候选波束。例如，预配置的候选波束集合包括16个候选波束。PHY层上报一组满足RSRP门限要求的候选波束。MAC层选择一个作为替换服务波束的新波束，并通知PHY层，由PHY层向基站发送随机接入信号(random access channel,RACH)。如果UE收到基站反馈的随机接入响应，则认为波束恢复成功，该新波束的波束方向可以通信。
在上文介绍的IAB架构中，每个IAB节点同时也作为基站设备为大量UE提供接入服务。所以，相比于其它波束失败恢复的场景，BFR的速度需要更快，以避免对大量UE的业务造成影响。
而从上面介绍的波束失败恢复的机制中可以看出，BFR的速度(或者说，BFR历经的时间)和基站侧配置的诸多参数相关。例如，这些参数包括BFD的定时器的长度、BFD RS的周期。BFD的定时器的长度越长，BFD RS的周期越大。BFR的速度越慢。进一步 地，BFR的速度与波束失败之后检测候选波束的时长也有关，而检测候选波束的时长与候选波束的周期有关，候选波束的周期越长，BFR的速度也越慢。BFR的速度和这些参数的相关性可以参见图2中所示的示意图。
参见如2，图2是波束失败检测以及进行BFR的示意图。如图2所示，在现有的波束失败检测以及波束失败恢复机制中，终端设备在和基站通信的过程中，检测基站配置的候选波束集合和BFD RS。候选波束集合中一般包括多个候选波束，例如图2中所示的候选波束1和候选波束2。根据BFD RS的测量结果以及上文介绍的波束失败检测的执行，终端设备中设置的BFI计数器进行计数。例如，BFI＝1。终端设备周期地检测候选波束集合和BFD RS，一旦BFI计数器达到预设的门限值(例如，门限值＝2)，则判定发生波束失败。终端设备检测到发生波束失败之后，需要等待下一次测量候选波束的时机。在下一次测量候选波束的时机到来之后，终端设备测量候选波束集合，得到测量结果。得到候选波束的测量结果之后，终端设备需要等待随机接入信号的时机(random access channel occasion,RO)，才能发起波束失败恢复流程。
从图2中不难看出，BFD RS和候选波束的周期越大，BFR的速度越慢。例如，在BFI＝1和BFI＝2之间，可能已经出现波束失败，但是由于当前配置的BFD RS的周期比较长，终端设备无法及时发现波束失败。又例如，BFI＝2时，终端设备检测到波束失败，但是此时终端设备又继续等待检测候选波束，如果候选波束的周期比较大，那么等待的时间也比较长，BFR的速度也越慢。由此，人们首先想到将BFD RS和/或候选波束的周期缩短。也即，BFD RS和候选波束在时域上分布更密集一些。但是，这就需要基站频繁发送BFD RS和候选波束，会给基站带来额外的资源开销。并且，如果BFD RS和候选波束的周期缩短，UE检测BFD RS和候选波束必然会消耗更多的电量。换句话说，虽然可以提高BFR的速度，但是IAB系统的其它性能下降了。
因此，如何优化IAB系统中的波束失败恢复机制是一个亟需解决的问题。
为此，本申请提供一种检测波束失败的方法和装置，可以优化IAB系统中的波束失败恢复机制，例如，降低资源开销，减小IAB节点的功耗等。
参见图3，图3是本申请提供的检测波束失败的方法300的示意性流程图。
本申请的检测波束失败的方法300可以应用于上行波束的失败检测，此时，第二节点为第一节点的下级节点，或者，第二节点为终端设备。可选地，方法300也可以用于下行波束的失败检测，此时第二节点为第一节点的上级节点，或者，第二节点为宿主基站(即，donor)。在以下实施例中，仅以下行波束的失败检测作为示例，对本申请提供的检测波束失败的方法300进行说明。
310、第二节点在预定的资源位置上发送第一种参考信号和/或第二种参考信号。第一节点在预定的资源位置上测量第一种参考信号和第二种参考信号。其中，第一种参考信号和第二种参考信号在时域上的间隔小于预设的时间窗口时，第一节点不同时测量第一种参考信号和第二种参考信号。
在本申请实施例中，第一种参考信号是第二节点配置的用于进行波束失败检测的参考信号。第一种参考信号包括但不限于如下参考信号：信道状态信息参考信号(channel state information reference signal,CSI-RS)、相位追踪参考信号(phase noise tracking RS,PTRS)、追踪参考信号(tracking RS,TRS)、信道探测参考信号(sounding reference signal,SRS) 和同步信号块(synchronization signal/physical broadcast channel block,SSB)等。
第二种参考信号用于第一节点解调第二节点发送的下行信号。第二种参考信号包括解调参考信号(demodulation reference signal,DMRS)。在本申请中，从第二节点的角度来说，第二节点可以调度某个下级节点(例如，本申请实施例中的第一节点)在一个特定的资源位置上接收下行信号，此种情况下，第二节点在该特定的资源位置上发送该下行信号以及用于解调该下行信号的解调参考信号。该解调参考信号即是本申请中所述的第二种参考信号。上述预定的资源位置包括时域资源位置、频域资源位置、时频资源位置，本申请不做限定。
从第一节点的角度来说，第一节点被调度在某个特定的资源位置上接收下行信号时，第一节点可以在该特定的资源位置上测量该下行信号的解调参考信号，并根据该解调参考信号执行下行波束的失败检测。因此，从第一节点的角度来说，第二种参考信号一方面用于解调第二节点发送的下行信号，另一方面用于第一节点进行波束失败检测。
步骤310中所述的预定的资源位置是第二节点配置的用于发送第一种参考信号的资源位置。换句话说，上述预定的资源位置的周期也可以认为是第一种参考信号的周期。
具体地，第一种参考信号的周期大于或等于第一节点和第二节点之间的下行时域资源的周期。这样，对于第二节点来说，可以减少第一种参考信号的发送，从而可以节省资源开销。对于第一节点来说，可以减少第一种参考信号的测量，从而可以减小第一节点的功耗。特别地，第一种参考信号的周期可以是第一节点和第二节点之间的下行时域资源的周期的整数倍，例如n倍，n≥1且为整数。优选地，n>1。
上述所说的下行时域资源可以包括下行子帧、下行时隙或下行符号等。预定的资源可以是协议定义的，也可以是通过信令配置的资源，本申请不做限定。在具体实现时，第二节点可以通过高层信令，例如，系统消息或者无线资源控制(radio resource control,RRC)信令等，为第一节点配置该下行时域资源。换句话说，下行时域资源是第二节点通过高层信令提前配置好的。或者说，第二节点在静态或者半静态的下行时域资源上向第一节点发送第一种参考信号。下行时域资源通常不是动态的时域资源，但是，在某些情况下，可以将灵活子帧配置为下行时域资源，本申请对下行时域资源的确定方式不加限制。
以时隙作为示例来说，第一种参考信号的周期的配置，可以与长期演进(long term evolution,LTE)或新空口(new radio，NR)中的时分复用(time division duplexing,TDD)系统中的上下行时隙配比的周期的配置类似。
例如，TDD系统中上下行时隙配比的周期可以为集合{ms0p5,ms0p625,ms1,ms1p25,ms2,ms2p5,ms5,ms10}中的一个，其中，ms0p5表示0.5ms，ms0p625表示0.625m。ms1表示1ms，ms2表示2ms，ms2p5表示2.5ms，ms5表示5ms，ms10表示10ms。因此，第一种参考信号的周期可以为这些上下行时隙配置中的下行时隙的周期的n倍，n≥1且n为整数，或者将第一种参考信号的周期配置为大于或等于上下行时隙配置中的下行时隙的周期。例如，子载波间隔为120KHz时，一个时隙的长度为0.125ms。假设第一节点和第二节点之间的上下行时隙配置以1.25ms为一个周期，则一个周期中包括10个时隙。假定该10个时隙中的第二个时隙和第五个时隙用于进行下行传输，则该第二个时隙和该第五个时隙即是下行时隙。第二节点可以在任意一个周期的第二个时隙和/或第五个时隙的位置发送第一种参考信号。
在步骤310中，第二节点可能只发送第一种参考信号，或者只发送第二种参考信号，或者同时发送第一种参考信号和第二种参考信号。
例如，第二节点在预定的资源位置上没有下行信号发送时，第二节点在预定的资源位置上发送第一种参考信号。第二节点在预定的资源位置上有下行信号发送时，第二节点在预定的资源位置上发送下行信号和用于解调下行信号的第二种参考信号，可以不发送第一种参考信号。
又例如，第二节点在预定的资源位置上有下行信号发送时，第二节点在预定的资源位置上除了发送第二种参考信号和下行信号，还发送第一种参考信号。也或者说，在预定的资源位置上，第二节点不论是否有下行信号发送，都发送第一种参考信号。当然，为了节省资源开销，第二节点在预定的资源上发送第二种参考信号和下行信号时，可以不发送第一种参考信号。
可选地，第一种参考信号和第二种参考信号在时域上可能重叠，或者也可以存在偏移。例如，在预定的资源位置上，第一种参考信号和第二种参考信号可以位于一个时隙内的相同的一个或几个符号上。或者，第一种参考信号和第二种参考信号可以位于同一个时隙的不同符号上。
可选地，本申请实施例中的下行信号也可以为下行数据。
在上述一种情况下，第二节点在预定的资源位置上发送下行信号和第二种参考信号。对于第一节点来说，第一节点根据第二节点的调度，确定在预定的资源位置上接收下行信号时，第一节点在预定的资源位置上测量第二种参考信号。进一步地，第一节点根据对第二种参考信号的测量结果来对服务波束进行失败检测。应理解，第二种参考信号的测量结果用于表征第二种参考信号的质量。
而在另一种情况下，第二节点在预定的资源位置上没有下行信号发送给第一节点，为了保证第一节点进行波束失败检测，第二节点发送第一种参考信号。对于第一节点来说，第一节点确定预定的资源位置未被调度用于数据传输时，第一节点在预定的资源位置上测量第一种参考信号，并根据对第一种参考信号的测量结果对服务波束进行失败检测。
在再一种情况下，第二节点在预定的资源位置上发送下行信号和第二种参考信号，以及第一种参考信号。第一节点根据第二节点的调度确定要在该预定的资源位置上接收下行信号时，作为一种实现方式，第一节点测量第二种参考信号以及第一种参考信号。进一步地，第一节点根据对第一种参考信号以及第二种参考信号的测量结果对服务波束进行失败检测。作为另一种实现方式，第一节点只测量第二种参考信号，而不测量第一种参考信号。例如，第二节点发送第一种参考信号的作用在于让第二节点的其它下级节点或UE测量第一种参考信号。这里，第二节点的其它下级节点可以包括除了第一节点之外的一个或多个下级节点。
可选地，如果第一种参考信号和第二种参考信号在时域上存在偏移，第一节点根据预设的时间窗口测量第一种参考信号和第二种参考信号。具体地，第一节点在测量第一种参考信号时，不在预设的时间窗口内测量第二种参考信号。或者，第一节点在测量第二种参考信号时，不在预设的时间窗口内测量第一种参考信号。即是说，如果第一种参考信号和第二种参考信号在时域上的偏移小于或等于预设的时间窗口，第一节点测量第一种参考信号时，不测量位于预设的时间窗口内的第二种参考信号，或者第一节点测量第二种参考信 号时，不测量位于预设的时间窗口内的第一种参考信号。如果第一种参考信号和第二种参考信号在时域上的偏移大于预设的时间窗口，第一节点测量第一种参考信号和第二种参考信号。应理解，预设的时间窗口可以为0，表示第一种参考信号和第二参考信号在时域上是重叠的，一般而言，此时第一种参考信号的周期是第二种参考信号周期的整数倍。
步骤310中所述的预设的时间窗口，也可以通过网络配置或协议规定。在通过网络配置时，可以由上级节点或者宿主基站配置。例如，在L3的IAB架构中，可以由上级节点直接为下级节点配置时间窗口。在L2的IAB架构中，可以由宿主基站为UE配置时间窗口。这里的时间窗口可以一个时隙或几个时隙，或者一个或几个符号等，也可以根据实际的测量需求配置其它的取值。
可选地，如果上级节点或宿主基站没有配置时间窗口，可以默认为第一种参考信号和第二种参考信号在时域上重叠时，第一节点测量第一种参考信号和第二种参考信号中的一种。而在第一种参考信号和第二种参考信号在时域上存在偏移时，第一节点需要测量第一种参考下信号以及第二种参考信号。
下面以图1中所示的IAB架构为例，结合图3对第二节点发送第一种参考信号和/或第二种参考信号进行说明。
参见图4，图4是第二节点向第一节点发送参考信号的示例。如图4所示，假设第一节点和第二节点之间的回传资源的周期被配置为1.25ms，也即10个时隙。其中，该10个时隙中的第2个时隙和第5个时隙为预定的下行回传(backhaul，BH)资源位置。在具体使用时，第二节点在预定的某个下行BH资源位置有下行信号发送时，第二节点在该下行BH资源位置上发送下行信号和用于解调下行信号的第二种参考信号(例如，DMRS)。应理解，该下行信号在图4中未示出。第二节点在预定的某个下行BH资源位置没有下行信号发送时，第二节点在该下行BH资源位置上发送第一种参考信号(例如，图4中所示的RS)。换句话说，预定的下行BH资源位置实际未被调度(或者被调度但未被使用)时，第二节点在该预定的下行BH资源位置上发送第一种参考信号。预定的下行BH资源实际被调度时，第一节点在该预定的下行BH资源上接收下行信号和第二种参考信号。
或者也可以说，第二节点按照第一参考信号的周期，在预定的下行BH资源位置上(例如图4中所示的第2个时隙和第5个时隙)固定发送第一种参考信号。但是对于第一节点来说，第一节点被调度在某个周期内的第2个时隙上接收下行信号，则在该周期的第2个时隙，第一节点可以通过测量下行信号的DMRS进行波束失败检测，而不去测量第一种参考信号。此种情况下，在第一节点测量DMRS的时隙上，第二节点也可以不发送第一种参考信号。这样可以减少第一种参考信号的发送，节省资源开销。
再或者说，第一种参考信号的周期是预定的(例如，协议规定或者第二节点配置)，且第一种参考信号配置在下行回传资源位置上。而第二种参考信号在时域上也位于下行回传资源位置。
应理解，图4中所示的在发送DMRS的下行BH资源位置上不发送RS，也可以表述为RS被DMRS替代。也即，RS在时域上是周期分布的，但是在有DMRS发送的资源位置上，RS可以不发送，或者说RS被DMRS替代。下文中的图5和图7中类似。
上文已经介绍过，第一种参考信号的周期可以大于或等于下行时域资源的周期。或者，第一种参考信号的周期可以大于或等于回传资源的周期。图4中所示以第一种参考信号的 周期和回传资源的周期相等作为示例。下面给出第一种参考信号的周期是回传资源的周期的n倍的一个示例，n>1且为整数。
例如图5所示，图5是第二节点向第一节点发送参考信号的另一个示例。在图5中，假设n＝2，其中，回传资源以10个时隙为一个周期，其中，第二个时隙和第五个时隙被预配置为下行回传资源。第二节点以20个时隙为一个周期在以静态或半静态方式被配置为下行回传资源的资源位置上发送第一种参考信号。如果第二节点在某个下行回传资源的位置上有下行信号发送给第一节点，此时第二节点可以不发送第一种参考信号。第一节点通过测量下行信号的DMRS进行波束失败检测。
可以理解的是，当n的取值越大，第一种参考信号的周期越大，第一种参考信号在时域上的分布越稀疏，也即第二节点发送第一种参考信号频率越低，可以更大程度地节省资源开销。在一种极端的情况下，第二节点频繁地发送下行信号发送给第一节点，或者说第二节点一直有下行信号发送给第一节点时，第一节点通过测量下行信号的解调参考信号(即第二种参考信号)即可以进行波束失败检测，甚至不需要第二节点发送第一种参考信号，可以最大程度地节省第二节点的资源开销，也节省了第一节点测量第一种参考信号的功耗。
可替换地，图5中所示的在发送DMRS的下行BH资源位置上不发送RS，也可以认为RS被DMRS替代。
320、第一节点根据该第一种参考信号或第二种参考信号的测量结果，对服务波束进行失败检测。
针对步骤310中介绍的第二节点在预定的资源位置上发送第一种参考信号和/或第二种参考信号的各种情况，第一节点在预定的资源位置上测量第一种参考信号和第二种参考信号。应理解，预定的资源位置在时域上周期分布的，从时序上来说，第一节点通过在预定的资源位置上测量第一种参考信号和第二种参考信号进行波束失败检测。但是，在一个特定的资源位置上，第一节点测量第一种参考信号和第二种参考信号中的一种。
在本申请的技术方案中，第二节点通过在预定的资源位置上发送第一种参考信号和/或第二种参考信号，可以实现波束失败检测。具体地，第二节点在预定的资源位置没有下行信号发送给第一节点时，第二节点发送第一种参考信号，以便于第一节点对第一种参考信号进行测量，进而对服务波束(具体为下行波束)进行失败检测。第二节点在预定置的资源位置上有下行信号发送给第一节点时，第一节点通过测量用于解调该下行信号的第二种参考信号，进行服务波束的失败检测。
下面说明第二节点在预定的资源位置上发送第一种参考信号和/或第二种参考信号的各种情况下，第一节点通过测量哪种参考信号来进行服务波束的失败检测。
情况1
第二节点在预定的资源位置上发送第一种参考信号，第一节点测量第一种参考信号。
第一节点测量第一种参考信号，并根据第一种参考信号的测量结果和判定条件，执行服务波束的失败检测。
情况1的技术方案的设计是考虑到第一节点可能不会一直都有下行信号需要接收，因此，第二节点很难确定一个半静态或静态的下行调度资源，让第一节点通过测量该下行信号的DMRS来执行服务波束的失败检测。因此，在情况1中，在预定的资源位置上，第 二节点没有下行信号发送给第一节点时，第二节点配置第一种参考信号给第一节点，以便于第一节点通过测量第一种参考信号来进行波束失败检测。
例如，第二节点向第一节点发送第一种参考信号的配置信息，该配置信息包括第一种参考信号的周期。第一节点根据该配置信息，接收第一种参考信号。
又例如，第一种参考信号和第二种参考信号具有准共址(quasi co-located,QCL)关系。举例说明QCL关系，例如上级节点使用波束A发送信号，下级节点进行接收。如果上级节点配置波束A与波束B存在QCL关系给下级节点，那么下级节点在接收波束B时，可以使用接收波束A的接收参数。或者，上级节点配置信号A与信号B存在QCL关系给下级节点，那么下级节点在接收信号B时，可以使用接收信号A的接收参数。
具体地，例如，用户设备(user equipment,UE)测量基站的同步信号SSB，UE通过调整接收参数，找到最佳的接收参数。之后某一时刻，基站调度UE接收下行数据，同时通知UE，这个下行数据的DMRS和SSB存在QCL关系。那么UE会使用接收SSB 1的接收参数，来接收这次调度的下行数据。具体到本申请实施例中，第一种参考信号和第二种参考信号具有准共址关系，第一节点接收第二种参考信号时，可以使用接收第一种参考信号的接收参数。或者，第一节点接收第一种参考信号时，可以使用接收第二种参考信号的接收参数。可选地，第一种参考下信号和第二种参考信号的QCL关系可以是QCL类型中的类型A(type A)、类型B(type B)、类型C(type C)或类型(type D)的任意一种，本申请不作限定。
进一步地，第二节点可以为第一节点配置两个第一种参考信号，其中一个第一种参考信号和DMRS具有QCL关系，而另一个第一种参考信号与DMRS不具有QCL关系。假定在预定的某个资源位置上，第一节点确定没有下行信号需要接收，第一节点测量和DMRS具有QCL关系的那一个第一种参考信号。也即是说，第一节点需要根据DMRS和这两个第一种参考信号是否具有QCL关系，选择测量这两个第一种参考信号中与该DMRS具有QCL关系的一个。当然，第二节点也可以为第一节点配置两个以上的第一种参考信号，也可以配置这两个以上的第一种参考信号中的一个或多个与DMRS具有QCL关系，本申请中不作限定。
第一节点测量第一种参考信号的假想PDCCH的BLER(hypothetical PDCCH BLER)。如果hypothetical PDCCH BLER大于预设的门限值，则BFI计数器加1。当BFI计数器的计数达到预设的门限值时，第一节点判定服务波束发生失败，发起BFR流程。
情况2
第二节点在预定的资源位置上发送下行信号和第二种参考信号，且不发送第一种参考信号。第一节点测量第二种参考信号。
具体地，第一节点测量第二种参考信号，并根据第二种参考信号的测量结果和判定条件执行服务波束的失败检测。
这里，作为示例，第一节点具体可以测量第二种参考信号的如下参数：块差错率(block error ratio,BLER)、参考信号接收功率(reference signal receiving power,RSRP)、接收信号强度指示(Received signal strength indicator,RSSI)和参考信号接收质量(reference signal receiving quality,RSRQ)等，来确定第二参考信号的质量。或者，第一节点还可以测量能够表征第二种参考信号的质量和/或强度的其它参数，本申请中不作限定。
应理解，判定条件是根据参考信号的质量参数设定的用于评估参考信号的质量的条件。例如，判定条件可以根据参考信号的BLER来设定，或者根据RSRP来设定，或者根据BLER和RSRP来设定，或者还可以根据其他可以表征参考信号的质量的参数来设定。还应理解，针对不同的参数，可以设定不同的判定条件。例如，针对BLER，判定条件可以是第二种参考信号的hypothetical PDCCH BLER大于或等于10％则判定产生BFI。又例如，针对RSRP，则判定条件可以是第二种参考信号的RSRP小于40％则判定产生BFI。需要说明的是，10％和40％仅是作为门限值的举例。该判定条件在情况1和情况3中也是适用的。
例如，第二节点在预定的资源位置上发送物理下行控制信道(physical downlink control channel,PDCCH)和用于解调PDCCH的DMRS。第一节点测量DMRS，并通过计算DMRS的假想PDCCH的BLER，进行波束失败检测。
类似地，第一节点测量DMRS的hypothetical PDCCH BLER。如果hypothetical PDCCH BLER大于预设的门限值，第一节点的物理层会上报一个BFI给MAC层，MAC层将BFI计数器加1。当BFI计数器的计数达到预设的门限值时，第一节点判定服务波束发生失败，发起BFR流程。
在本申请提供的会检测波束失败的方法300应用于IAB场景中时，由于IAB节点通常是固定不动的，同时，IAB节点为大量的UE提供服务，因此，上级的IAB节点很可能需要频繁地进行下行传输。如上文所述，缩短BFD的周期是加快BFR的一种途径，而BFD的周期取决于回传资源的周期、回传下行传输时机的周期等。而鉴于上级IAB节点需要频繁地进行下行传输，因此回传资源的周期、回传下行传输时机的周期等相对是比较短的。因此，第二节点在有下行信号发送给第一节点时，第一节点通过检测下行信号的DMRS，显然是可以缩短BFD的周期，因而可以提高BFR的速度。
同时，对于第二节点来说，第二节点不需要发送短周期的(或者说，密集的)第一种参考信号用来进行波束失败检测，因此，也可以降低第二节点的资源开销。
情况3
第二节点预定的资源位置上发送下行信号和第二种参考信号，且发送第一种参考信号。
在情况3中，可选地，作为一种实现方式，第一节点测量只测量第二种参考信号而不测量第一种参考信号。进一步地，第一节点根据对第二种参考信号的测量结果执行服务波束的失败检测。作为另一种实现方式，第一节点同时测量第一种参考信号和第二种参考信号，并根据对第一种参考信号的测量结果以及对第二种参考信号的测量结果，来执行服务波束的失败检测。这里不再赘述。
类似地，第一节点测量DMRS的hypothetical PDCCH BLER。如果hypothetical PDCCH BLER大于预设的门限值，第一节点的物理层会上报一个BFI给MAC层，MAC层将BFI计数器加1。如果下一个周期第二节点没有下行信号发送，第一节点测量第一种参考信号(例如，CSI-RS,SSB等)。同样地，如果第一种参考信号的hypothetical PDCCH BLER大于预设的门限值，则BFI计数器加1。当BFI计数器的计数达到预设的门限值时，第一节点判定服务波束发生失败，发起BFR流程。
可选地，上述方法300还可以包括步骤330。
330、第二节点确定发送第一种参考信号的资源位置和发送第二参考信号的资源位置。
这里，第二节点确定的发送第一种参考信号的资源位置和发送第二种参考信号的资源位置，分别可以是上文中步骤310中所述的预定的资源位置的子集。换句话说，预定的资源位置在时域上是周期分布的。而第二节点确定的发送第一种参考信号的资源位置，是预定的资源位置中的一部分资源位置，第二节点确定的发送第二种参考信号的资源位置，也是预定的资源位置中的一部分资源位置。可选地，针对预定的资源位置，发送第一种参考信号的资源位置和发送第二种参考信号的资源位置互为补集。或者说，在某个预定的资源位置上，如果第二节点有下行信号发送，该预定的资源位置也就是发送第二种参考信号的位置。在某个预定的资源位置上，如果第二节点没有下行信号发送，该预定的资源位置就是发送第一种参考信号的位置。步骤310中，第二节点在预定的资源位置上发送第一种参考信号和/或第二种参考信号，也即第二节点在步骤330中确定的资源位置上，发送第一种参考信号和/或第二种参考信号。
可选地，为了进一步提高BFR的速度，本申请实施例中，第一节点在进行测量第一种参考信号和第二种参考信号的同时，检测候选波束集合。通常，候选波束集合是通过配置一个参考信号集合来实现的。该参考信号集合中的不同参考信号在空间上通过不同的波束承载发送。所述在空间上不同的波束即是候选波束。因此，当参考信号集合中包括多个参考信号时，通常就有多个候选波束，该多个候选波束构成候选波束集合。
以下，将第一节点从候选波束集合中选择的该一个或多个新波束称作第一波束。也即，第一节点可以根据测量结果，从候选波束集合中选择一个或多个第一波束。
可选地，第一节点针对一个或多个第一波束，分别向第二节点发送一个或多个上行信号，该一个或多个上行信号用于从所述第一或多个第一波束中确定目标第一波束。
应理解，当第一节点从候选波束集合中选择了一个第一波束时，则这个第一波束即可以认为是目标第一波束，不涉及从多个第一波束中确定目标第一波束的过程。下文凡是涉及确定目标第一波束的实施例，则默认为第一波束有多个。
这里，第一节点进行波束失败恢复时，向第二节点发送的上行信号可以包括但不限于承载在随机接入信道、物理上行控制信道(physical uplink control channel,PUCCH)和物理上行共享信道(physical uplink shared channel,PUSCH)上。下文以该上行信号承载在随机接入信道作为示例，说明波束失败恢复的流程。
第一节点从候选波束集合中选择一个或多个第一波束，并在一个或多个第一波束各自对应的非竞争随机接入(contention-free random access,CFRA)资源或竞争随机接入资源(contention based random access,CBRA)上发送随机接入请求。可以理解的是，第二节点发送多个随机接入请求，可以提高波束恢复的成功率。
第二节点检测第一节点发送的一个或多个随机接入请求，并向第一节点发送随机接入响应。可选地，第一节点可以针对多个随机接入请求分别发送随机接入响应，或者，第一节点也可以针对多个随机接入请求只发送一个随机接入响应。
第一节点在多个随机接入请求各自对应的控制资源集合(CORESET)上监听随机接入响应。第一节点可以选择将最先收到的随机接入响应对应的第一波束确定为目标第一波束，或者第一节点将信号强度最强的随机接入响应对应的第一波束确定为目标第一波束。又例如，第二节点也可以仅在接收功率最强的随机接入响应对应的第一波束上发送随机接 入响应。此种情况下，第一节点只会接收到一个随机接入响应，并将随机接入响应对应的第一波束确定目标第一波束。
根据上述的任意一种方式确定目标第一波束之后，第二节点和第一节点将服务波束调整到目标第一波束上。换句话说，第一节点和第二节点将目标第一波束作为新的服务波束。
进一步地，根据上述图2可以看出，候选波束的周期也是影响BFR的速度的一个因素。候选波束的周期越大，在发生波束失败之后，等待检测候选波束的时间将会越长，从而也会使得BFR历经的时间更长。
因此，在本申请实施例中，可选地，第一节点还可以设置一个定时器。第一节点在检测候选波束集合得到测量结果后立即开启该定时器，该定时器作为第一节点判断候选波束集合的测量结果是否有效的依据。具体地，如果第一节点在开启定时器之后，第一节点检测到服务波束发生失败，此时，如果定时器还没有超时，则第一节点认为候选波束集合的测量结果依然有效。这种情况下，第一节点以测量结果作为依据，从候选波束集合中选择可用于替换服务波束的一个或多个新波束，并直接进入波束失败恢复流程，不需要等待下一次的候选波束检测时机。
参见图6，图6是候选波束的测量结果的有效窗口的示意图。如图6所示，假设第一节点设置的BFI计数器的门限值为2，BFI计数器的默认初始值为0。从时序上来说，第一节点测量BFD RS之后，如果满足预设条件，则将BFI计数器加1，如图6中所示的BFI＝1。第一节点测量候选波束1，得到测量结果(记作测量结果1)后立即开启针对候选波束1的定时器。第二节点测量候选波束2，得到测量结果(记作测量结果2)后立即开启针对候选波束2的定时器。其中，图6中，候选波束1之后的虚线框表示测量结果1的有效窗口，候选波束2之后的虚线框表示测量结果2的有效窗口。假定第一节点在测量BFD RS的过程中，BFI计数器的数值达到预设的门限值，则第二节点判定服务波束失败。如果第二节点判定服务波束失败的时间落在候选波束的测量结果的有效窗口内，则第一节点认为该测量结果依然有效。以图6所示为例，BFI＝2落在测量结果1和测量结果2的有效窗口内，则测量结果1和测量结果2都有效。因此，第一节点可以根据测量结果1和测量结果2，从该候选波束1和候选波束2中选择满足条件的波束，并在下一个随机接入时机(random access channel occasion,RO)到来时直接发起随机接入流程，以进行波束失败恢复。可以看出，设置候选波束的测量结果的有效窗口，可以加快BFR的速度。
例如，继续以图6为例，假设不存在有效窗口，第一节点在检测候选波束1和候选波束2之后，BFI计数器的数值达到预设的门限值2，第一节点判定服务波束失败。此时，第一节点只能等待下一次候选波束检测时机，并在检测候选波束得到测量结果之后等待RO，进而才能发起随机接入流程来进行波束失败恢复。由此可见，通过设置候选波束的测量结果的有效窗口，可以让第一节点在发生波束失败之前预检测候选波束。从而，在发生波束失败之后，第一节点可以直接根据上一次候选波束的测量结果发起波束失败恢复流程，不需要等待下一次的候选波束测量，可以提高BFR的速度。
以上各实施例中以下行波束的失败检测作为示例，对本申请提供的检测波束失败的方法300进行了说明。将方法300应用于上行波束的失败检测时，也是类似的。
例如，上级节点可以调度下级节点在预定的资源位置上发送第一种参考信号，在上行波束的失败检测中，第一种参考信号包括但不限于是探测参考信号(sounding reference  signal,SRS)。如果下级节点在预定的资源位置上有上行信号发送，则下级节点在该预定的资源位置上发送上行信号和第二种参考信号。上级节点测量第二种参考信号，并根据第二种参考信号的测量结果进行上行波束的失败检测。如果下级节点在预定的资源位置上没有上行信号发送，则下级节点在预定的资源位置上发送第一种参考信号。上级节点测量第一种参考信号，并根据第一种参考信号的测量结果判断上行波束的质量，进行上行波束的失败检测。
需要说明的是，在上行波束的失败检测中，第一种参考信号是在上行时域资源上发送的。例如，第一种参考信号的周期大于或等于上级节点和下级节点之间的上行时隙的周期。可选地，第一种参考信号的周期是上级节点和下级节点之间的上行时隙的周期的整数倍。
下面给出一个上行波束失败检测的示意图，参见图7，图7是上行波束失败检测的示意图。如图7中的(1)和(2)所示，子载波间隔为120kHz，那么一个时隙的时间长度为0.125ms。假设回传资源的周期被配置为1.25ms，也即10个时隙。那么回传资源的位置按照10个时隙为一个周期进行重复。假设10个时隙中的第二个时隙和第五个时隙通过静态或半静态方式被配置为上行回传资源。如果上级节点在该第二个时隙调度下级节点发送上行数据，例如，物理上行控制信道(physical uplink control channel,PUCCH)或物理上行共享信道(physical uplink shared channel，PUSCH)，上级节点可以通过测量上行数据的DMRS来执行波束失败检测。如果第二个时隙实际没有被调度用于上行数据的传输，或者第二个时隙实际被调度用于上行数据传输但未使用，则下级节点在第二个时隙发送第一种参考信号(例如，SRS)。此种情况下，上级节点测量下级节点在第二个时隙发送的SRS，并根据对SRS的测量结果来执行上行波束的失败检测。
需要说明的是，图7中仅以第一种参考信号的周期和回传资源的周期相等作为示例。第一种参考信号的周期可以是回传资源的周期的n倍，n>1且为整数。
可替换地，图7中所示的在发送DMRS的上行BH资源位置上不发送SRS，也可以认为SRS被DMRS替代。
此外，在上行波束的失败检测中，也可以为每个候选波束的测量结果设置有效窗口，以便在发生波束失败时可以快速发起波束恢复流程。
可选地，本申请还提供一种检测波束失败的方法400，该方法400包括如下步骤410-420。
410、第一节点测量第二节点发送的用于解调下行信号的解调参考信号，得到解调参考信号DMRS的测量结果。
420、第一节点根据解调参考信号的测量结果，进行波束失败检测。
与方法300不同的是，在方法400中，如果第二节点一直有下行信号发送给第一节点，第一节点通过测量DMRS就可以进行波束失败检测，第一节点甚至不需要配置用于进行波束失败检测的参考信号，例如方法300中的第一种参考信号。
进一步地，考虑到DMRS只有在第二节点有下行数据发送给第一节点时才会被发送，没有固定的周期，因此，为了保证第一节点的波束失败检测，可以通过协议规定或者由第二节点通过高层信令配置在时域上周期分布的资源位置，即预定的资源位置。第二节点在预定的资源位置上有下行信号发送时，第二节点可以不发送用于进行波束失败检测的参考信号，第一节点测量该下行信号的DMRS进行波束失败检测。第二节点在预定的资源位 置上没有下行信号发送时，第二节点发送用于进行波束失败检测的参考信号，以供第一节点测量，这样可以保证波束失败的检测。这个方案如上文介绍的方法300，不再赘述。
以上对本申请提供的检测波束失败的方法300进行了详细说明，下面介绍本申请提供的检测波束失败的装置。
参见图8，图8是本申请提供的通信装置500的示意性结构框图。如图8所示，通信装置500包括收发单元510和处理单元520。
收发单元510，用于在预定的资源位置上，测量第二节点发送的第一种参考信号和第二种参考信号，所述第一种参考信号用于进行波束失败检测，所述第二种参考信号用于解调第二节点发送的下行信号，其中，所述第一种参考信号和所述第二种参考信号在时域上的间隔小于预设的时间窗口时，所述单元510用于不同时测量所述第一种参考信号和所述第二种参考信号；
处理单元520，用于根据所述第一种参考信号或所述第二种参考信号的测量结果，进行服务波束的失败检测。
可选地，通信装置500可以对应本申请提供的检测波束失败的方法300及其各实施例中的第一节点。通信装置500包括的各单元分别用于实现方法300及其各实施例中由第一节点执行的相应操作和/或流程。
可选地，通信装置500还可以为配置在第一节点中的芯片或集成电路。
可选地，收发单元510可以由接收单元和发送单元组成。
可选地，收发单元520可以为收发器，处理单元520可以为处理器。收发器可以包括发射机和接收机，同时具备接收和发送的功能。
可选地，收发单元510还可以为输入输出接口，或者输入输出电路。
参见图9，图9是本申请提供的通信装置600的示意性结构框图。如图9所示，通信装置600包括收发单元610和处理单元620。
处理单元610，用于确定发送第一种参考信号的资源位置和发送第二种参考信号的资源位置，所述第一种参考信号用于进行波束失败检测，所述第二种参考信号用于解调所述第二节点发送的下行信号；
收发单元610，用于在所述确定的资源位置上发送第一种参考信号和/或第二种参考信号。
可选地，通信装置600可以对应本申请提供的检测波束失败的方法300及其各实施例中的第二节点。通信装置600包括的各单元分别用于实现方法300及其各实施例中由第二节点执行的相应操作和/或流程。
可选地，通信装置600还可以为配置在第二节点中的芯片或集成电路。
可选地，收发单元620可以由接收单元和发送单元组成。
可选地，处理单元610可以是处理器。收发单元620可以收发器。收发器可以包括发射机和接收机，同时具备接收和发送的功能。
可选地，收发单元620还可以为输入输出接口，或者输入输出电路。
参见图10，图10是本申请提供的通信设备700的示意性结构图。如图10所示，通信设备700包括：一个或多个处理器701，一个或多个存储器702，一个或多个收发器703。处理器701用于控制收发器703收发信号，存储器702用于存储计算机程序，处理器701 用于从存储器702中调用并运行该计算机程序，以执行本申请提供的检测波束失败的方法300以及各实施例中由第一节点执行的相应流程和/或操作。
例如，通信设备700可以对应方法实施例中的第一节点。具体地，通信设备700的处理器701可以对应图8中所示的处理单元520，收发器703可以对应图8中所示的收发单元510。
例如，处理器701用于执行图3中所示的步骤320。收发器703用于执行图3中从第二节点接收第一种参考信号和第二种参考信号的步骤310。此外，处理器701还用于执行测量第一种参考信号和/或第二种参考信号的步骤，以及执行根据第一种参考信号和/或第二种参考信号的测量结果判断是否产生BFI步骤，以及判定服务波束发生失败的步骤。处理器701还用于根据第二节点的调度确定在预定的资源位置上是否需要接收下行信号的步骤。收发器703还用于执行从第二节点接收候选波束集合的步骤。处理器701还用于执行测量候选波束集合的步骤，以及执行根据候选波束的测量结果从候选波束集合中选择第一波束的步骤。处理器701还用于执行开启定时器的步骤以及判定定时器是否超时的步骤。处理器701还用于执行在确定定时器未超时的情况下，根据候选波束的测量结果从候选波束集合中确定一个或多个第一波束的步骤。
参见图11，图11是本申请提供的通信设备800的示意性结构图。如图11所示，通信设备800包括：一个或多个处理器801，一个或多个存储器802，一个或多个收发器803。处理器801用于控制收发器803收发信号，存储器802用于存储计算机程序，处理器801用于从存储器802中调用并运行该计算机程序，以执行本申请提供的检测波束失败的方法300以及各实施例中由第二节点执行的相应流程和/或操作。
例如，通信设备800的处理器801可以对应图9中所示的处理单元610，收发器803可以对应图9中所示的收发单元620。
例如，处理器801用于执行图3中所示的步骤330。收发器803用于执行图3中发送第一种参考信号和/或第二种参考信号的步骤310。此外，处理器801还用于执行调度第一节点在预定的资源位置接收下行信号的步骤。收发器803还用于根据处理器的调度执行在预定的资源位置上发送第一种参考信号的步骤，或在预定的资源上不发送第一种参考信号，或者根据处理器的调度执行在预定的资源位置上发送下行信号和第二种参考信号的步骤。
此外，本申请提供一种计算机可读存储介质，该计算机可读存储介质中存储有计算机指令，当该计算机指令在计算机上运行时，使得计算机执行本申请实施例的检测波束失败的方法300中由第一节点执行的相应操作和/或流程。
本申请还提供一种计算机程序产品，该计算机程序产品包括计算机程序代码，当该计算机程序代码在计算机上运行时，使得计算机执行本申请实施例的检测波束失败的方法300中由第一节点执行的相应操作和/或流程。
本申请还提供一种芯片，包括处理器。该处理器用于调用并运行存储器中存储的计算机程序，以执行本申请实施例的检测波束失败的方法300中由第一节点执行的相应操作和/或流程。
可选地，该芯片还包括存储器，存储器与处理器连接。处理器用于读取并执行存储器中的计算机程序。
进一步可选地，该芯片还包括通信接口，处理器与该通信接口连接。通信接口用于接收需要处理的信号和/或数据，处理器从该通信接口获取该信号和/或数据，并对该信号和/或数据进行处理。可选地，该通信接口可以是输入输出接口，具体可以包括输入接口和输出接口。可选地，该通信接口可以是输入输出电路，具体可以包括输入电路和输出电路。
本申请提供一种计算机可读存储介质，该计算机可读存储介质中存储有计算机指令，当该计算机指令在计算机上运行时，使得计算机执行本申请实施例的检测波束失败的方法300中由第二节点执行的相应操作和/或流程。
本申请还提供一种计算机程序产品，该计算机程序产品包括计算机程序代码，当该计算机程序代码在计算机上运行时，使得计算机执行本申请实施例的检测波束失败的方法300中由第二节点执行的相应操作和/或流程。
本申请还提供一种芯片，包括处理器。该处理器用于调用并运行存储器中存储的计算机程序，以执行本申请实施例的检测波束失败的方法300中由第二节点执行的相应操作和/或流程。
可选地，该芯片还包括存储器，存储器与处理器连接。处理器用于读取并执行存储器中的计算机程序。
进一步可选地，该芯片还包括通信接口，处理器与该通信接口连接。通信接口用于接收需要处理的信号和/或数据，处理器从该通信接口获取该信号和/或数据，并对该信号和/或数据进行处理。可选地，该通信接口可以是输入输出接口，具体可以包括输入接口和输出接口。可选地，该通信接口可以是输入输出电路，具体包括输入电路和输出电路。
可选的，上述实施例中涉及的存储器与存储器可以是物理上相互独立的单元，或者，存储器也可以和处理器集成在一起。
以上各实施例中，处理器可以为中央处理器(central processing unit，CPU)、微处理器、特定应用集成电路(application-specific integrated circuit，ASIC)，或一个或多个用于控制本申请技术方案程序执行的集成电路等。例如，处理器可以是数字信号处理器设备、微处理器设备、模数转换器、数模转换器等。处理器可以根据这些设备各自的功能而在这些设备之间分配终端设备或网络设备的控制和信号处理的功能。此外，处理器可以具有操作一个或多个软件程序的功能，软件程序可以存储在存储器中。处理器的所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
存储器可以是只读存储器(read-only memory，ROM)、可存储静态信息和指令的其它类型的静态存储设备、随机存取存储器(random access memory，RAM)或可存储信息和指令的其它类型的动态存储设备，也可以是电可擦可编程只读存储器(electrically erasable programmable read-only memory，EEPROM)、只读光盘(compact disc read-only memory，CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其它磁存储设备，或者还可以是能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其它介质等。
本申请实施例中，“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示单独存在A、同时存在A和B、单独存在B的情况。其中A， B可以是单数或者复数。
本领域普通技术人员可以意识到，本文中公开的实施例中描述的各单元及算法步骤，能够以电子硬件、计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
在本申请所提供的几个实施例中，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅是示意性的，例如单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元也可以不是物理上分开的，作为单元显示的部件也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本申请技术方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (34)

  1. 一种检测波束失败的方法，其特征在于，包括：
    第一节点在预定的资源位置上，测量第二节点发送的第一种参考信号和第二种参考信号，所述第一种参考信号用于进行波束失败检测，所述第二种参考信号用于解调所述第二节点发送的下行信号，其中，所述第一种参考信号和所述第二种参考信号在时域上的间隔小于预设的时间窗口时，所述第一节点不同时测量所述第一种参考信号和所述第二种参考信号；
    所述第一节点根据所述第一种参考信号或第二种参考信号的测量结果，进行服务波束的失败检测。
  2. 根据权利要求1所述的方法，其特征在于，所述第一节点在所述预定的资源位置上，测量所述第二节点发送的第一种参考信号和第二种参考信号，包括：
    所述第一节点根据所述第二节点的调度，确定在所述预定的资源位置上接收下行信号时，所述第一节点测量所述第二种参考信号且不测量所述第一种参考信号；
    或者，
    所述第一节点确定所述预定的资源位置未被调度用于下行信号的传输时，所述第一节点测量所述第一种参考信号。
  3. 根据权利要求2所述的方法，其特征在于，所述第一节点根据所述第一种参考信号或第二种参考信号的测量结果，进行服务波束的失败检测，包括：
    所述第一节点根据所述第一种参考信号或所述第二种参考信号的测量结果，以及判定条件，进行所述服务波束的失败检测，其中，所述判定条件是根据参考信号的质量参数设定的用于评估参考信号的质量的条件。
  4. 根据权利要求3所述的方法，其特征在于，所述方法还包括：
    所述第一节点检测候选波束集合，得到候选波束的测量结果，其中，所述候选波束的测量结果用于指示候选波束的质量；
    所述第一节点开启定时器；
    所述第一节点判定所述服务波束失败之后，所述方法还包括：
    所述第一节点确定所述定时器是否超时，并在所述定时器未超时的情况下根据所述候选波束的测量结果，从所述候选波束集合中确定可用于替换所述服务波束的一个或多个第一波束。
  5. 根据权利要求1所述的方法，其特征在于，所述第一种参考信号和所述第二种参考信号在时域上的间隔小于预设窗口时，所述第一节点不同时测量所述第一种参考信号和所述第二种参考信号，包括：
    所述第一节点测量所述第二种参考信号时，在预设的时间窗口内不对所述第一种参考信号进行测量；或者，
    所述第一节点测量所述第一种参考信号时，在预设的时间窗口内不对所述第二种参考信号进行测量。
  6. 根据权利要求1-5中任一项所述的方法，其特征在于，所述第一种参考信号的资 源位置在时域上是周期分布的，所述第一种参考信号的时域资源的周期大于或等于所述第一节点和所述第二节点之间的下行时域资源的周期。
  7. 一种检测波束失败的方法，其特征在于，包括：
    第二节点确定发送第一种参考信号的资源位置和发送第二种参考信号的资源位置，所述第一种参考信号用于进行波束失败检测，所述第二种参考信号用于解调所述第二节点发送的下行信号；
    所述第二节点在确定的资源位置上发送第一种参考信号和/或第二种参考信号。
  8. 根据权利要求7所述的方法，其特征在于，所述第二节点在确定的资源位置上发送第一种参考信号和/或第二种参考信号，包括：
    所述第二节点调度第一节点在所述确定的资源位置上接收下行信号时，所述第二节点在所述第二种参考信号的资源位置上不发送所述第一种参考信号。
  9. 根据权利要求7或8所述的方法，其特征在于，所述第一种参考信号的资源位置和所述第二种参考信号的资源位置在时域上小于预设的时间窗口。
  10. 根据权利要求7-9任一项所述的方法，其特征在于，所述第一种参考信号的资源位置在时域上是周期分布的，所述第一种参考信号的时域资源的周期大于或等于所述第一节点和所述第二节点之间的下行时域资源的周期。
  11. 一种检测波束失败的装置，其特征在于，包括：
    收发单元，用于在预定的资源位置上测量第二节点发送的第一种参考信号和第二种参考信号，所述第一种参考信号用于进行波束失败检测，所述第二种参考信号用于解调所述第二节点发送的下行信号，其中，所述第一种参考信号和所述第二种参考信号在时域上的间隔小于预设的时间窗口时，所述收发单元用于不同时测量所述第一种参考信号和所述第二种参考信号；
    处理单元，用于根据所述第一种参考信号或第二种参考信号的测量结果，进行服务波束的失败检测。
  12. 根据权利要求11所述的装置，其特征在于，所述处理单元用于根据所述第二节点的调度确定在所述预定的资源位置上是否接收下行信号；
    所述收发单元，用于在所述处理单元确定在所述预定的资源位置上接收下行信号时，测量所述第二种参考信号且不测量所述第一种参考信号；或者，
    所述收发单元，用于在所述处理单元确定所述预定的资源位置未被调度用于下行信号的传输时，测量所述第一种参考信号。
  13. 根据权利要求12所述的装置，其特征在于，所述处理单元用于根据所述第一种参考信号或所述第二种参考信号的测量结果，以及判定条件，进行所述服务波束的失败检测，其中，所述判定条件是根据参考信号的质量参数设定的用于评估参考信号的质量的条件。
  14. 根据权利要求13所述的装置，其特征在于，所述收发单元还用于检测候选波束集合，得到候选波束的测量结果，其中，所述候选波束的测量结果用于指示候选波束的质量；
    所述处理单元还用于开启定时器；
    所述处理单元还用于在判定所述服务波束失败之后，确定所述定时器是否超时，并在 所述定时器未超时的情况下根据所述候选波束的测量结果，从所述候选波束集合中确定可用于替换所述服务波束的一个或多个第一波束。
  15. 根据权利要求11所述的装置，其特征在于，所述第一种参考信号和所述第二种参考信号子时域上的间隔小于预设的时间窗口时，所述收发单元用于：
    测量所述第二种参考信号时，在预设的时间窗口内不对所述第一种参考信号进行测量；或者，
    测量所述第一种参考信号时，在预设的时间窗口内不对所述第二种参考信号进行测量。
  16. 根据权利要求11-15中任一项所述的装置，其特征在于，所述第一种参考信号的资源位置在时域上是周期分布的，所述第一种参考信号的时域资源的周期大于或等于所述第一节点和所述第二节点之间的下行时域资源的周期。
  17. 一种检测波束失败的装置，其特征在于，包括：
    处理单元，用于确定发送第一种参考信号的资源位置和发送第二种参考信号的资源位置，所述第一种参考信号用于进行波束失败检测，所述第二种参考信号用于解调所述装置发送的下行信号；
    收发单元，用于在所述确定的资源位置上发送第一种参考信号和/或第二种参考信号。
  18. 根据权利要求17所述的装置，其特征在于，所述收发单元用于在所述处理单元调度所述第一节点在所述确定的资源位置上接收下行信号时，在所述第二种参考信号的资源位置上不发送所述第一种参考信号。
  19. 根据权利要求17或18所述的装置，其特征在于，所述第一种参考信号的资源位置和所述第二种参考信号的资源位置在时域上小于预设的时间窗口。
  20. 根据权利要求17-19中任一项所述的装置，其特征在于，所述第一种参考信号的资源位置在时域上是周期分布的，所述第一种参考信号的时域资源的周期大于或等于所述第一节点和所述第二节点之间的下行时域资源的周期。
  21. 一种通信设备，其特征在于，包括：
    收发器，用于在预定的资源位置，测量第二节点发送的第一种参考信号和第二种参考信号，所述第一种参考信号用于进行波束失败检测，所述第二种参考信号用于解调所述第二节点发送的下行信号，其中，所述第一种参考信号和所述第二种参考信号在时域上的间隔小于预设的时间窗口时，所述第一节点不同时测量所述第一种参考信号和所述第二种参考信号；
    处理器，用于根据所述第一种参考信号或第二种参考信号的测量结果，进行服务波束的失败检测。
  22. 根据权利要求21所述的通信设备，其特征在于，所述处理器用于根据所述第二节点的调度确定在所述预定的资源位置上是否接收下行信号；
    所述收发器，用于在所述处理器确定在所述预定的资源位置上接收下行信号时，测量所述第二种参考信号且不测量所述第一种参考信号；或者，
    所述收发器，用于在所述处理器确定所述预定的资源位置未被调度用于下行信号的传输时，测量所述第一种参考信号。
  23. 根据权利要求22所述的通信设备，其特征在于，所述处理器用于根据所述第一 种参考信号或所述第二种参考信号的测量结果，以及判定条件，进行所述服务波束的失败检测，其中，所述判定条件是根据参考信号的质量参数设定的用于评估参考信号的质量的条件。
  24. 根据权利要求23所述的通信设备，其特征在于，所述收发器还用于检测候选波束集合，得到候选波束的测量结果，其中，所述候选波束的测量结果用于指示候选波束的质量；
    所述处理器还用于开启定时器；
    所述处理器还用于在判定所述服务波束失败之后，确定所述定时器是否超时，并在所述定时器未超时的情况下根据所述候选波束的测量结果，从所述候选波束集合中确定可用于替换所述服务波束的一个或多个第一波束。
  25. 根据权利要求21所述的通信设备，其特征在于，所述第一种参考信号和所述第二种参考信号子时域上的间隔小于预设的时间窗口时，所述收发器用于：
    测量所述第二种参考信号时，在预设的时间窗口内不对所述第一种参考信号进行测量；或者，
    测量所述第一种参考信号时，在预设的时间窗口内不对所述第二种参考信号进行测量。
  26. 根据权利要求21-25中任一项所述的通信设备，其特征在于，所述第一种参考信号的资源位置在时域上是周期分布的，所述第一种参考信号的时域资源的周期大于或等于所述第一节点和所述第二节点之间的下行时域资源的周期。
  27. 一种通信设备，其特征在于，包括：
    处理器，用于确定发送第一种参考信号的资源位置和发送第二种参考信号的资源位置，所述第一种参考信号用于进行波束失败检测，所述第二种参考信号用于解调所述通信设备发送的下行信号；
    收发器，用于在所述确定的资源位置上发送第一种参考信号和/或第二种参考信号。
  28. 根据权利要求27所述的通信设备，其特征在于，所述收发器用于在所述处理器调度所述第一节点在所述确定的资源位置上接收下行信号时，在所述第二种参考信号的资源位置上不发送所述第一种参考信号。
  29. 根据权利要求27或28所述的通信设备，其特征在于，所述第一种参考信号的资源位置和所述第二种参考信号的资源位置在时域上小于预设的时间窗口。
  30. 根据权利要求27-29中任一项所述的通信设备，其特征在于，所述第一种参考信号的资源位置在时域上是周期分布的，所述第一种参考信号的时域资源的周期大于或等于所述第一节点和所述第二节点之间的下行时域资源的周期。
  31. 一种计算机可读存储介质，其特征在于，包括计算机指令，当所述计算机指令在计算机上运行时，使得计算机执行如权利要求1-6中任一项所述的方法。
  32. 一种计算机可读存储介质，其特征在于，包括计算机指令，当所述计算机指令在计算机上运行时，使得计算机执行如权利要求7-10中任一项所述的方法。
  33. 一种通信装置，其特征在于，所述通信装置包括至少一个处理器，所述至少一个处理器与至少一个存储器耦合：
    所述至少一个处理器，用于执行所述至少一个存储器中存储的计算机程序或指令，以 使得所述通信装置执行如权利要求1-6中任一项所述的方法。
  34. 一种通信装置，其特征在于，所述通信装置包括至少一个处理器，所述至少一个处理器与至少一个存储器耦合：
    所述至少一个处理器，用于执行所述至少一个存储器中存储的计算机程序或指令，以使得所述通信装置执行如权利要求7-10中任一项所述的方法。
PCT/CN2019/114567 2018-10-31 2019-10-31 检测波束失败的方法和装置 WO2020088565A1 (zh)

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